Medium: mysql: fix validation return codes
Medium: mysql: fix validation return codes

For missing config and missing datadir, return $OCF_ERR_INSTALLED, not
$OCF_ERR_CONFIGURED. Another node may have a valid config and datadir,
it's pointless to keep the cluster manager from running this resource
anywhere in the cluster.

asp24/resource-agents,stevenraspudic/resource-agents,asp24/resource-agents,asp24/resource-agents,stevenraspudic/resource-agents,stevenraspudic/resource-agents