Use the init script to stop the controller
This cleans up the pidfile along with stopping the process.
@@ -31,7 +31,7 @@ module TerminateHelper
# Let's make sure we restart any non-appscale service.
`service monit restart`
- `/usr/bin/python2 /root/appscale/scripts/stop_service.py /root/appscale/AppController/djinnServer.rb /usr/bin/ruby`
+ `service appscale-controller stop`
`monit start all`
`rm -f #{APPSCALE_CONFIG_DIR}/port-*.txt`
