Moved hardcoded dependency versions to properties tag in pom.xml (#1582)

pom.xml

@@ -111,21 +111,46 @@
         <compiler.version>1.8</compiler.version>
         <scala.compiler.version>2.11.7</scala.compiler.version>
         <powermock.version>1.6.4</powermock.version>
-        <docker.plugin.version>0.4.13</docker.plugin.version>
         <checkstyle.version>6.18</checkstyle.version>
+        <junit.version>4.12</junit.version>
+        <mockito-all.version>1.10.19</mockito-all.version>
+
+        <!-- Plugin versions -->
+        <docker.plugin.version>0.4.13</docker.plugin.version>
+        <takari-maven-plugin.version>0.6.1</takari-maven-plugin.version>
+        <exec-maven-plugin.version>1.6.0</exec-maven-plugin.version>
+        <maven-antrun-plugin.version>1.8</maven-antrun-plugin.version>
+        <maven-deploy-plugin.version>2.8.2</maven-deploy-plugin.version>
+        <maven-assembly-plugin.version>3.1.0</maven-assembly-plugin.version>
+        <maven-failsafe-plugin.version>2.22.0</maven-failsafe-plugin.version>
+        <maven-surefire-plugin.version>2.22.0</maven-surefire-plugin.version>
+        <maven-jar-plugin.version>3.1.0</maven-jar-plugin.version>
+        <maven-shade-plugin.version>3.1.1</maven-shade-plugin.version>
+        <maven-enforcer-plugin.version>3.0.0-M2</maven-enforcer-plugin.version>
+        <apache-rat-plugin.version>0.12</apache-rat-plugin.version>
+        <maven-compiler-plugin.version>3.8.0</maven-compiler-plugin.version>
+        <maven-resource-plugin.version>3.1.0</maven-resource-plugin.version>
+        <maven-source-plugin.version>3.0.1</maven-source-plugin.version>
+        <versions-maven-plugin.version>2.5</versions-maven-plugin.version>
+        <coveralls-maven-plugin.version>4.3.0</coveralls-maven-plugin.version>
+        <jacoco-maven-plugin.version>0.8.1</jacoco-maven-plugin.version>
+        <maven-checkstyle-plugin.version>3.0.0</maven-checkstyle-plugin.version>
+
+
+
     </properties>
 
     <dependencies>
         <dependency>
             <groupId>junit</groupId>
             <artifactId>junit</artifactId>
-            <version>4.12</version>
+            <version>${junit.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.mockito</groupId>
             <artifactId>mockito-all</artifactId>
-            <version>1.10.19</version>
+            <version>${mockito-all.version}</version>
             <scope>test</scope>
         </dependency>
         <dependency>
@@ -149,47 +174,47 @@
                 <plugin>
                     <groupId>io.takari</groupId>
                     <artifactId>maven</artifactId>
-                    <version>0.6.1</version>
+                    <version>${takari-maven-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <groupId>org.codehaus.mojo</groupId>
                     <artifactId>exec-maven-plugin</artifactId>
-                    <version>1.6.0</version>
+                    <version>${exec-maven-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-antrun-plugin</artifactId>
-                    <version>1.8</version>
+                    <version>${maven-antrun-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-deploy-plugin</artifactId>
-                    <version>2.8.2</version>
+                    <version>${maven-deploy-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-assembly-plugin</artifactId>
-                    <version>3.1.0</version>
+                    <version>${maven-assembly-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-failsafe-plugin</artifactId>
-                    <version>2.22.0</version>
+                    <version>${maven-failsafe-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-surefire-plugin</artifactId>
-                    <version>2.22.0</version>
+                    <version>${maven-surefire-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-jar-plugin</artifactId>
-                    <version>3.1.0</version>
+                    <version>${maven-jar-plugin.version}</version>
                 </plugin>
                 <plugin>
                     <artifactId>maven-shade-plugin</artifactId>
-                    <version>3.1.1</version>
+                    <version>${maven-shade-plugin.version}</version>
                 </plugin>
             </plugins>
         </pluginManagement>
         <plugins>
             <plugin>
                 <artifactId>maven-enforcer-plugin</artifactId>
-                <version>3.0.0-M2</version>
+                <version>${maven-enforcer-plugin.version}</version>
                 <executions>
                     <execution>
                         <id>enforce-java</id>
@@ -210,7 +235,7 @@
             <plugin>
                 <groupId>org.apache.rat</groupId>
                 <artifactId>apache-rat-plugin</artifactId>
-                <version>0.12</version>
+                <version>${apache-rat-plugin.version}</version>
                 <configuration>
                     <excludes>
                         <exclude>**/target/**</exclude>
@@ -282,7 +307,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.8.0</version>
+                <version>${maven-compiler-plugin.version}</version>
                 <configuration>
                     <source>${compiler.version}</source>
                     <target>${compiler.version}</target>
@@ -291,7 +316,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-resources-plugin</artifactId>
-                <version>3.1.0</version>
+                <version>${maven-resource-plugin.version}</version>
                 <configuration>
                     <encoding>${project.build.sourceEncoding}</encoding>
                 </configuration>
@@ -307,7 +332,7 @@
             <plugin>
                 <!-- 源码插件 -->
                 <artifactId>maven-source-plugin</artifactId>
-                <version>3.0.1</version>
+                <version>${maven-source-plugin.version}</version>
                 <!-- 发布时自动将源码同时发布的配置 -->
                 <executions>
                     <execution>
@@ -322,12 +347,12 @@
             <plugin>
                 <groupId>org.codehaus.mojo</groupId>
                 <artifactId>versions-maven-plugin</artifactId>
-                <version>2.5</version>
+                <version>${versions-maven-plugin.version}</version>
             </plugin>
             <plugin>
                 <groupId>org.eluder.coveralls</groupId>
                 <artifactId>coveralls-maven-plugin</artifactId>
-                <version>4.3.0</version>
+                <version>${coveralls-maven-plugin.version}</version>
                 <configuration>
                     <sourceDirectories>
                         <sourceDirectory>${project.build.sourceDirectory}</sourceDirectory>
@@ -338,7 +363,7 @@
             <plugin>
                 <groupId>org.jacoco</groupId>
                 <artifactId>jacoco-maven-plugin</artifactId>
-                <version>0.8.1</version>
+                <version>${jacoco-maven-plugin.version}</version>
                 <configuration>
                     <excludes>
                         <exclude>*MethodAccess</exclude>
@@ -355,7 +380,7 @@
             </plugin>
             <plugin>
                 <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>3.0.0</version>
+                <version>${maven-checkstyle-plugin.version}</version>
                 <dependencies>
                     <dependency>
                         <groupId>org.apache.skywalking</groupId>