Update built_in_plugins.ts

public/app/features/plugins/built_in_plugins.ts

@@ -24,19 +24,19 @@ import * as testDataAppPlugin from 'app/plugins/app/testdata/module';
 import * as testDataDSPlugin from 'app/plugins/app/testdata/datasource/module';
 
 const builtInPlugins = {
-  "app/plugins/datasource/graphite/module": graphitePlugin,
-  "app/plugins/datasource/cloudwatch/module": cloudwatchPlugin,
-  "app/plugins/datasource/elasticsearch/module": elasticsearchPlugin,
-  "app/plugins/datasource/opentsdb/module": opentsdbPlugin,
-  "app/plugins/datasource/grafana/module": grafanaPlugin,
-  "app/plugins/datasource/influxdb/module": influxdbPlugin,
-  "app/plugins/datasource/mixed/module": mixedPlugin,
-  "app/plugins/datasource/mysql/module": mysqlPlugin,
-  "app/plugins/datasource/postgres/module": postgresPlugin,
-  "app/plugins/datasource/mssql/module": mssqlPlugin,
-  "app/plugins/datasource/prometheus/module": prometheusPlugin,
-  "app/plugins/app/testdata/module": testDataAppPlugin,
-  "app/plugins/app/testdata/datasource/module": testDataDSPlugin,
+  'app/plugins/datasource/graphite/module': graphitePlugin,
+  'app/plugins/datasource/cloudwatch/module': cloudwatchPlugin,
+  'app/plugins/datasource/elasticsearch/module': elasticsearchPlugin,
+  'app/plugins/datasource/opentsdb/module': opentsdbPlugin,
+  'app/plugins/datasource/grafana/module': grafanaPlugin,
+  'app/plugins/datasource/influxdb/module': influxdbPlugin,
+  'app/plugins/datasource/mixed/module': mixedPlugin,
+  'app/plugins/datasource/mysql/module': mysqlPlugin,
+  'app/plugins/datasource/postgres/module': postgresPlugin,
+  'app/plugins/datasource/mssql/module': mssqlPlugin,
+  'app/plugins/datasource/prometheus/module': prometheusPlugin,
+  'app/plugins/app/testdata/module': testDataAppPlugin,
+  'app/plugins/app/testdata/datasource/module': testDataDSPlugin,
 
   'app/plugins/panel/text/module': textPanel,
   'app/plugins/panel/graph/module': graphPanel,