allow xapooledconnectionfactory as an admin object - allows xa enlistment at the session level for jms style use cases with the RAR contents. validation of https://issues.apache.org/jira/browse/AMQ-3560 in eap 6.1

git-svn-id: https://svn.apache.org/repos/asf/activemq/trunk@1508958 13f79535-47bb-0310-9956-ffa450edef68