Code review comment for lp:~freyes/charms/trusty/percona-cluster/lp1426508

Mario was reviewing this patch and he found a problem when mysqld is killed and the pidfile is left the agent (mysql_monitor) doesn't properly detect that mysql is not running. I filed a pull request[0] to address this scenario.

[0] https://github.com/percona/percona-pacemaker-agents/pull/53