Fix a bug reported by @Leemoonsoo

zeppelin-web/src/app/credential/credential.controller.js

@@ -146,4 +146,4 @@ angular.module('zeppelinWebApp').controller('CredentialCtrl', function($scope, $
   };
   
   init();
-});
+});

zeppelin-web/src/app/credential/credential.html

@@ -138,7 +138,7 @@ limitations under the License.
                 </button>
                 <button type="button" class="btn btn-default btn-xs"
                         ng-disabled="valueform.$waiting"
-                        ng-click="valueform.$cancel();">
+                        ng-click="valueform.$cancel(); cancelCredentialInfoUpdate();">
                   <span class="fa fa-remove"></span> cancel
                 </button>
               </form>