Changed state property for models/group.py to be optional as the description states.
Changed state property for models/group.py to be optional as the description states.

Patch by: Lennard de Rijk

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging