[WFCORE-64] : Filesystem deployment scanner deployment failure removes unrelated deployments

Only deployments marked as PERSITENT=false (which means deployments made by the scanner) will be undeployed instead of all of them.
Since we don't have a simple way to link a deployment to a scanner this fix won't be enought for a multiple scanners case which is traced by WFCORE-65.
Jira: https://issues.jboss.org/browse/WFCORE-64