fix a issue that missing the additional fields defined in test.yaml than in default.xml

data/custom/ip/private.yaml

+title: 私有IP
+desc: 引用系统IP定义
+author: zentao
+version: 1.0
+
+field: privateIP
+instances:
+
+  - instance: all
+    fields:
+      - field: part1
+        from: system.ip.v1.yaml
+        use: privateA, privateB, privateC
+        prefix: ""
+        postfix: "/"
+
+      - field: part2
+        from: custom.test.number.v1.yaml
+        use: netmask
\ No newline at end of file

data/custom/test/number/v1.yaml

+title: number
+desc: 数字分组
+author: wwccss
+version: 1.0
+
+field: number
+note: 数值类型数据
+prefix: "'"
+postfix: "'"
+ranges:
+  small: 1-9
+  medium: 101-199
+  large: 10001-99999
+  netmask: 8,16,24
\ No newline at end of file