Updated openstack/openstack
Project: openstack/requirements  7945ab46defedc7d7e1675bfbcaf0da8b22ed7a6
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Revert "Allow Django 1.5 and 1.6"

This reverts commit 50c8c04dc25bddaa727d99a170086252ee95a740.

Change-Id: I6752e3213a462c9d23947b99b9f0adae46c9bd76
Closes-Bug:1257809