Remove duplicate X-Roles
Remove duplicate X-Roles

Remove duplicate X-Roles from fakeAuthTokenHeaders.

Change-Id: Idba0c5c8a039800220c0fbb7980052cba7c7e107
Closes-Bug: #1550089

ArchiFleKs/magnum,jay-lau/magnum,ArchiFleKs/magnum,openstack/magnum,openstack/magnum