removed error callback if mapping update fails

Author: bharathkontham

lib/esConnector.js

@@ -134,7 +134,7 @@ ESConnector.prototype.connect = function (callback) {
             })
             .catch(function (err) {
               log('ESConnector.prototype.connect', 'setupMappings', 'failed', err);
-              callback && callback(err);
+              callback && callback(null, self.db);
             });
         } else {
           process.nextTick(function () {