Enable image import test
Enable image import test

If glance is in standalone mode, image import works
fine so enable the tempest tests. Once we will have image
import or other async tasks working with glance under uwsgi
then we can remove this flag and run import tests by default.

Depends-On: https://review.opendev.org/#/c/741425/
Change-Id: I853e8a3815187f0aa8f05c70488ec948a97e55a6

nawawi/openstack,openstack-dev/devstack,openstack-dev/devstack,nawawi/openstack