Glance should not be exposing import methods that cannot work via its
API, but it does today. In order for tempest (et al) to be able to
properly detect whether import is possible, we must configure the
import methods in standalone mode, or disable them in wsgi mode. The
referenced Glance patch will make this a requirement.
Change-Id: I3bf3498d83607c5e98b70877c061dc54fc3c0a6e
Needed-By: https://review.opendev.org/#/c/741497/
442c57e168