TOMEE-1338 - DeployerEjb tests
Fix DeployerEjb property override.
Fix potential NP if OpenEjb.destroy is called be user.

git-svn-id: https://svn.apache.org/repos/asf/tomee/tomee/branches/tomee-1.7.x@1621158 13f79535-47bb-0310-9956-ffa450edef68