add version & action in rpc header

Author: 普冬

lib/rpc.js

@@ -143,7 +143,9 @@ class RPCClient {
     opts = Object.assign({
       headers: {
         'x-sdk-client': helper.DEFAULT_CLIENT,
-        'user-agent': helper.DEFAULT_UA
+        'user-agent': helper.DEFAULT_UA,
+        'x-acs-action': action,
+        'x-acs-version': this.apiVersion
       }
     }, this.opts, opts);