[security-dev] pull request for partition creation

- Added partition creation support to File and JPA stores - Added findTier(), findRealm(), createRealm(), createTier() methods to IdentityManagerFactory. - Initialized the DefaultStoreFactory storeCache in the constructor - Changed DefaultStoreFactory hashmaps to ConcurrentHashMaps Won't be slighted if you don't approve the pull request. But it would be cool to at least decide on what the high level interface will be for this. Then I can just implement something in my repository and be unblocked for my other work. Thanks. -- Bill Burke JBoss, a division of Red Hat http://bill.burkecentral.com