SOSHibernate should raise a specific exception when using transactions with versioning

Current Situation

• SOSHibernateSession raises an SOSHibernateObjectOperationException exception when the executions of the delete(Object item), update(Object item) methods are failed.
• No extra exception will be raised, when a hibernate optimistic locking are used and the stale data are detected.

Desired Behaiviour

• In case of the stale data an SOSHibernateObjectOperationStaleStateException (extends SOSHibernateObjectOperationException) exception should be raised.