Merge pull request #12383 from CorpGlory/master

Set $rootScope in DatasourceSrv

public/app/features/plugins/datasource_srv.ts

@@ -7,7 +7,7 @@ export class DatasourceSrv {
   datasources: any;
 
   /** @ngInject */
-  constructor(private $q, private $injector, $rootScope, private templateSrv) {
+  constructor(private $q, private $injector, private $rootScope, private templateSrv) {
     this.init();
   }
 
@@ -61,7 +61,7 @@ export class DatasourceSrv {
         this.datasources[name] = instance;
         deferred.resolve(instance);
       })
-      .catch(function(err) {
+      .catch(err => {
         this.$rootScope.appEvent('alert-error', [dsConfig.name + ' plugin failed', err.toString()]);
       });