This patch fix the deployment stop--> start problem reported in the JBAS-1997 and the similar bug JBAS-2001 that is caused by a PolicyConfiguration state problem in the EARDeployer.stop().
JBAS-1997 MainDeployer.start(String url) cause InstanceAlreadyExistsException
JBAS-2001 PolicyConfiguration is not treated in EARDeployer.stop()