if apps crash on startup, then fail deploy process

we saw an issue where the app started, then immediately crashed due to
a setup error. However, jenkins had already returned positively, and
the deploy continued.

cf-deploy should fail if the app doesn't start up.

We do this by looking through the cloudfoundry events, and aborting
if there are any `app.crash` events for the new GUID.

scripts/run_app_paas.sh

@@ -55,8 +55,6 @@ function on_exit {
       break
     fi
   done
-  echo "Application process terminated, waiting 10 seconds"
-  sleep 10
   echo "Terminating remaining subprocesses.."
   kill 0
 }