JCR-3635: Manually specified jcr:frozenUuid overwriting the one assigned by the VersionManager when versioning node

Patch and test case by Florin Iordache.

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/trunk@1509101 13f79535-47bb-0310-9956-ffa450edef68