Set default `PG*` environment variables. Just in case `setup-postgres-env.sh` isn't sourced beforehand, e.g. when running tox.
Set default `PG*` environment variables. Just in case `setup-postgres-env.sh` isn't sourced beforehand, e.g. when running tox.

ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/django-icekit,ic-labs/django-icekit