[FLINK-2111] Make stoppable stream task and stoppable stream source o…

…perator type safe

Update index.js and reset vendor.css and vendor.js to master version

Update web-dashboard

Remove duplicate flink-runtime-web dependency from flink-tests

Remove not used ProgramStopException

Change stopping behaviour to only work in job status RUNNING

This closes apache#750.

docs/apis/cli.md

@@ -252,7 +252,8 @@ Action "cancel" cancels a running program.
                                    configuration.
 
 
-Action "stop" stops a running program (streaming jobs only).
+Action "stop" stops a running program (streaming jobs only). There are no strong consistency
+guarantees for a stop request.
 
   Syntax: stop [OPTIONS] <Job ID>
   "stop" action options:

flink-clients/src/main/java/org/apache/flink/client/program/Client.java

@@ -443,7 +443,7 @@ public void cancel(JobID jobId) throws Exception {
 	 * 
 	 * @param jobId
 	 *            the job ID of the streaming program to stop
-	 * @throws ProgramStopException
+	 * @throws Exception
 	 *             If the job ID is invalid (ie, is unknown or refers to a batch job) or if sending the stop signal
 	 *             failed. That might be due to an I/O problem, ie, the job-manager is unreachable.
 	 */

flink-core/src/main/java/org/apache/flink/api/common/functions/StoppableFunction.java

@@ -29,5 +29,5 @@ public interface StoppableFunction {
 	 * <p>
 	 * <strong>The call to {@code stop()} should not block and not throw any exception.</strong>
 	 */
-	public void stop();
+	void stop();
 }

flink-runtime-web/web-dashboard/app/partials/jobs/job.jade

@@ -43,7 +43,7 @@ nav.navbar.navbar-default.navbar-fixed-top.navbar-main(ng-if="job")
     span.navbar-info-button.btn.btn-default(ng-click="cancelJob($event)")
       | Cancel
 
-  .navbar-info.last.first(ng-if!="job.isStoppable && (job.state=='CREATED' || job.state=='RUNNING' || job.state=='RESTARTING')")
+  .navbar-info.last.first(ng-if!="job.isStoppable && job.state=='RUNNING'")
     span.navbar-info-button.btn.btn-default(ng-click="stopJob($event)")
       | Stop