Updated openstack/openstack
Project: openstack/nova  612167a058f196686d3d5c0477791444642c5770

Remove support for deprecated header X_ROLE

X_ROLE support was deprecated in 2012
(bc0ba55ae6ce7b9b9bf5c9dd359f9d812ac8d18d) we are overdue in removing
support for it.

Change-Id: I81d1bb4eb4ac7278c02e3e937f74aeadbd20c0f5