Implemented stop method of job_manager.

cloudcontrol/node/jobs.py

@@ -62,7 +62,12 @@ class JobManager(object):
     def start(self):
         pass
     def stop(self):
-        pass
+        logger.debug('Stopping all currently running jobs')
+        for job in self.jobs.itervalues():
+            try:
+                job.stop()
+            except Exception:
+                pass
 
 
 class BaseThreadedJob(Thread):