dal: Unregistered entities fixups in DAO and fixtures

1. Add unregistered Template entity to fixtures file
2. Use FixturesTool with the new entities
3. Fix UnregisteredOVFDataDAOTest accordingly
4. Fix typos found in the UnregisteredOVFDataDAOTest

Change-Id: I3b8663eec50968c0553c8fc6e841b3244ffd418b
Bug-Url: https://bugzilla.redhat.com/1138114
Signed-off-by: Maor Lipchuk <mlipchuk@redhat.com>