Fix inheritance in soc.models.base module. FieldsProxy inherited from DbModelForm which was deleted in previous commits (replace that with BaseForm).
Fix inheritance in soc.models.base module. FieldsProxy inherited from DbModelForm which was deleted in previous commits (replace that with BaseForm).

Patch by: Pawel Solyga

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