update DispatchRequest, add QUERY_DOCUMENT header

Author: Francesca-Bit

lib/dispatchRequest.js

@@ -128,6 +128,9 @@ function DispatchRequest(url, action, payload, local_auth, remote_auth = null, c
                     if (err.response && err.response.data) e.data = err.response.data
                     throw e
                 })
+        case CONST.QUERY_DOCUMENT:
+            options.headers = options.headers ? options.headers : {}
+            options.headers['X-HTTP-Method-Override'] = 'GET'
         default:
             options.headers = options.headers ? options.headers : {}
             options.headers['Content-Type'] = 'application/json'