Commenting out GroupLayer and GroupMap Foreign keys due to circular imports
use geonode.contrib.groups.models.Group vs geonode.contrib.auth.models.Group in layers/views.py
use geonode.contrib.groups.models.Group vs geonode.contrib.auth.models.Group in search/search.py
use geonode.contrib.groups.models.Group vs geonode.contrib.auth.models.Group in security/auth.py
use geonode.contrib.groups.models.Group vs geonode.contrib.auth.models.Group in security/models.py