AMBARI-2829. Dashboard refactor and Unit tests. (onechiporenko)

ambari-web/app/assets/test/tests.js

@@ -91,4 +91,4 @@ require('test/views/main/dashboard/widgets/pie_chart_widget_test');
 require('test/views/main/dashboard/widgets/namenode_cpu_test');
 require('test/views/common/configs/services_config_test');
 require('test/models/host_test');
-require('test/models/rack_test');
+require('test/models/rack_test');