[EAGLE-852] Application start button should be disabled when it's running, and the same for stop button.

EAGLE-852 Application start button should be disabled when it's running, and the same for stop button.
- Add disabled judgment logic.

executable | status  | start button | stop button
---|--- | --- | ---
Y | INITIALIZED | Y | N
Y | STARTING | N | N
Y | RUNNING | N | Y
Y | STOPPING | N | N
Y | STOPPED | N | N
N | INITIALIZED | N | N

https://issues.apache.org/jira/browse/EAGLE-852

Author: chitin <chitin1027@gmail.com>

Closes #767 from chitin/EAGLE-852-startbutton.
diff --git a/eagle-server/src/main/webapp/app/dev/partials/integration/site.html b/eagle-server/src/main/webapp/app/dev/partials/integration/site.html
index a13599d..57a9b8d 100644
--- a/eagle-server/src/main/webapp/app/dev/partials/integration/site.html
+++ b/eagle-server/src/main/webapp/app/dev/partials/integration/site.html
@@ -62,10 +62,16 @@
 				<td class="text-center">
 					<div class="btn-group btn-group-xs" ng-if="app.installed">
 						<!--button class="btn btn-default btn-sm">Monitor</button-->
-						<button class="btn btn-default btn-sm" ng-click="startApp(app)" ng-if="app.descriptor.executable">
+						<button class="btn btn-default btn-sm" ng-click="startApp(app)" ng-if="app.descriptor.executable && app.status === 'INITIALIZED'">
 							<span class="fa fa-play"></span>
 						</button>
-						<button class="btn btn-default btn-sm" ng-click="stopApp(app)" ng-if="app.descriptor.executable">
+						<button class="btn btn-default btn-sm" disabled="disabled" ng-if="app.descriptor.executable && app.status !== 'INITIALIZED'">
+							<span class="fa fa-play"></span>
+						</button>
+						<button class="btn btn-default btn-sm" ng-click="stopApp(app)" ng-if="app.descriptor.executable && app.status === 'RUNNING'">
+							<span class="fa fa-stop"></span>
+						</button>
+						<button class="btn btn-default btn-sm" disabled="disabled" ng-if="app.descriptor.executable && app.status !== 'RUNNING'">
 							<span class="fa fa-stop"></span>
 						</button>
 						<button class="btn btn-default btn-sm" disabled="disabled" ng-if="!app.descriptor.executable">