[security-dev] pull request for partition creation

[Bill Burke]

- 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