[WFLY-561] Move toward consistent enabling/disabling of statistics

See http://lists.jboss.org/pipermail/wildfly-dev/2013-December/001270.html

This PR updates messaging, infinispan, transactions and resource-adapters.

JGroups stats are not enabled via a static attribute; rather they use a property name. So making those consistent requires https://issues.jboss.org/browse/WFLY-2453.

JPA is maintained in jipijapa, so that will need to be fixed there.