Add additional fields to log_json
Add additional fields to log_json

We should store people mappings in the revision content because those
are part of the object and we need that data or snapshots.

VinnieJohns/ggrc-core,andrei-karalionak/ggrc-core,AleksNeStu/ggrc-core,plamut/ggrc-core,selahssea/ggrc-core,andrei-karalionak/ggrc-core,plamut/ggrc-core,VinnieJohns/ggrc-core,selahssea/ggrc-core,selahssea/ggrc-core,selahssea/ggrc-core,andrei-karalionak/ggrc-core,VinnieJohns/ggrc-core,plamut/ggrc-core,AleksNeStu/ggrc-core,AleksNeStu/ggrc-core,VinnieJohns/ggrc-core,AleksNeStu/ggrc-core,andrei-karalionak/ggrc-core,plamut/ggrc-core