[optimizer] Rename optimizer project to "flink-optimizer" (previously flink-compiler)

flink-clients/pom.xml

@@ -50,7 +50,7 @@ under the License.
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
-			<artifactId>flink-compiler</artifactId>
+			<artifactId>flink-optimizer</artifactId>
 			<version>${project.version}</version>
 		</dependency>
 		

flink-dist/pom.xml

@@ -61,7 +61,7 @@ under the License.
 
 		<dependency>
 			<groupId>org.apache.flink</groupId>
-			<artifactId>flink-compiler</artifactId>
+			<artifactId>flink-optimizer</artifactId>
 			<version>${project.version}</version>
 		</dependency>
 

flink-compiler/pom.xml → flink-optimizer/pom.xml

@@ -29,8 +29,8 @@ under the License.
 		<relativePath>..</relativePath>
 	</parent>
 
-	<artifactId>flink-compiler</artifactId>
-	<name>flink-compiler</name>
+	<artifactId>flink-optimizer</artifactId>
+	<name>flink-optimizer</name>
 
 	<packaging>jar</packaging>