Updated openstack/openstack
Project: openstack/requirements  a9440f54c0025c04d4a4b2e1a15d19206e6536f9
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Mirror gear - it's needed by tripleo-ci.

This runs in the restricted openstack-mirror only environment so we
need it here to have access to it.

Change-Id: Ibe912c0dec503d8d08c0f69751d1cd14887730ff