Updated openstack/openstack
Project: openstack/glance  ae1a7262bc433711fba8d2cb8cebe0d66054131e
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Enable F40X checking

Clean up imports due to F401 and F403 checks.
F401  'module' imported but unused
F403  unable to detect undefined names with wildcard import

Change-Id: I487edb157de1a6babc7ad8a3fb65f195e476c490