Enable proxy headers parsing for Aodh
Enable proxy headers parsing for Aodh

http_proxy_to_wsgi middleware was recently added to Aodh [1] and
in order to take it into use, we need to enable it via hiera.

[1] If2ada8a94c8e1ceacd4509605b4cd766a78f71d5
Depends-On: I0981e152700ed4511b797011ebe18e857c1fed71
Related-Bug: #1590608

Change-Id: Ie9605ae1e5437f488802b03ca23a325866f0ceb5

openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates