Fix test_admin to expect admin endpoint
Fix test_admin to expect admin endpoint

This fix makes test_admin expect admin endpoint in a response preserving
the correct behaviour for test_public

Change-Id: I2769eddb94918e16d3589d6237841c961eab435a
Closes-Bug: #1478629

klmitch/keystone,roopali8/keystone,dstanek/keystone,cernops/keystone,mahak/keystone,rajalokan/keystone,ilay09/keystone,vivekdhayaal/keystone,jamielennox/keystone,takeshineshiro/keystone,himanshu-setia/keystone,roopali8/keystone,himanshu-setia/keystone,openstack/keystone,openstack/keystone,dstanek/keystone,jamielennox/keystone,ajayaa/keystone,mahak/keystone,cernops/keystone,rajalokan/keystone,takeshineshiro/keystone,vivekdhayaal/keystone,idjaw/keystone,dims/keystone,dstanek/keystone,ajayaa/keystone,dims/keystone,openstack/keystone,jonnary/keystone,ilay09/keystone,rajalokan/keystone,klmitch/keystone,maestro-hybrid-cloud/keystone,jonnary/keystone,ilay09/keystone,idjaw/keystone,vivekdhayaal/keystone,mahak/keystone,maestro-hybrid-cloud/keystone