为form组件挂载通用方法

src/business/platform/form/utils/JForm.js

@@ -10,6 +10,7 @@
  */
 import _ from "lodash";
 import request from "@/utils/request";
+import common from '@/utils/common'
 
 // 定义全局
 var JForm;
@@ -32,6 +33,7 @@ _.extend(JForm, {
     this.$form = form;
     this.$request = request;
     this._isInitialization = true;
+    this.$common = common
   },
 
   // 表单加载