Commit 29f1e0839c6a8e7322a2554b5bd611f6254b788e in isis's branch refs/heads/master from Dan Haywood
[ https://git-wip-us.apache.org/repos/asf?p=isis.git;h=29f1e08 ]
ISIS-1407: ensures that internal domain services (not annotated with @DomainService) are also loaded into the metamodel as service specifications.
ie markAsService toggled on. This then means that the code to invoke markAsService() whenever any PersistenceSession is opened can be removed.