AXIOM-444: Fixed another issue revealed by r1431544. Since Spring-WS doesn't use OMAbstractFactory, the OMMetaFactory is not a singleton.


git-svn-id: https://svn.apache.org/repos/asf/webservices/commons/trunk/modules/axiom@1431647 13f79535-47bb-0310-9956-ffa450edef68