优化sdk-nodejs以下功能：

1、新增同步请求方式（executeSync、executeTokenSync）；
2、优化请求异常中断问题，返回502错误码；
3、优化签名方法；

sop-sdk/sdk-nodejs/request/BaseRequest.js

@@ -1,35 +1,35 @@
-const {Class} = require("../common/Class");
+const {Class} = require('../common/Class');
 
 /**
  * 请求类父类
  */
 exports.BaseRequest = Class.create({
-    init: function(){
-        this.bizModel = {}
+    init: function () {
+        this.bizModel = {};
         /*
         [
             {name: 'file1', path: 'd:/dd/1.txt'},
             {name: 'file2', path: 'd:/dd/2.txt'}
         ]
          */
-        this.files = []
+        this.files = [];
     },
     /**
      * 返回接口名称
      */
-    getMethod: function() {
+    getMethod: function () {
         throw `未实现BaseRequest类getMethod()方法`;
     },
     /**
      * 返回版本号
      */
-    getVersion: function() {
+    getVersion: function () {
         throw '未实现BaseRequest类getVersion()方法';
     },
     /**
      * 返回请求类型，使用RequestType.js
      */
-    getRequestType: function() {
+    getRequestType: function () {
         throw '未实现BaseRequest类getRequestType()方法';
     },
     /**
@@ -40,9 +40,9 @@ exports.BaseRequest = Class.create({
     parseResponse: function (responseData) {
         let data = responseData['error_response'];
         if (!data) {
-            const dataNodeName = this.getMethod().replace(/\./g, '_') + '_response'
-            data = responseData[dataNodeName]
+            const dataNodeName = this.getMethod().replace(/\./g, '_') + '_response';
+            data = responseData[dataNodeName];
         }
         return data;
     }
-})
+});