AMBARI-3547 Can't delete host when heartbeating is lost. (ababiichuk)

ambari-web/app/controllers/main/host/details.js

@@ -679,7 +679,8 @@ App.MainHostDetailsController = Em.Controller.extend({
      }
      var stoppedStates = [App.HostComponentStatus.stopped, 
                           App.HostComponentStatus.install_failed, 
-                          App.HostComponentStatus.upgrade_failed];
+                          App.HostComponentStatus.upgrade_failed,
+                          App.HostComponentStatus.unknown];
      var masterComponents = [];
      var runningComponents = [];
      var unknownComponents = [];