test REMOTE_USER  does not authenticate
test REMOTE_USER  does not authenticate

if external (and all other methods) are missing  this test ensures
that  a request with REMOTE_USER set  that the token would come
through as unauthenticated

Change-Id: I08a0117773bd4efd8e220306de7ba82df73f7403

openstack/keystone,UTSA-ICS/keystone-kerberos,vivekdhayaal/keystone,ging/keystone,maestro-hybrid-cloud/keystone,nuxeh/keystone,idjaw/keystone,rajalokan/keystone,rajalokan/keystone,himanshu-setia/keystone,roopali8/keystone,vivekdhayaal/keystone,jumpstarter-io/keystone,nuxeh/keystone,jonnary/keystone,ilay09/keystone,UTSA-ICS/keystone-kerberos,klmitch/keystone,ilay09/keystone,promptworks/keystone,rodrigods/keystone,reeshupatel/demo,vivekdhayaal/keystone,takeshineshiro/keystone,jamielennox/keystone,nuxeh/keystone,dstanek/keystone,maestro-hybrid-cloud/keystone,jumpstarter-io/keystone,blueboxgroup/keystone,ajayaa/keystone,mahak/keystone,jamielennox/keystone,promptworks/keystone,ging/keystone,openstack/keystone,MaheshIBM/keystone,cernops/keystone,blueboxgroup/keystone,idjaw/keystone,ajayaa/keystone,ilay09/keystone,jumpstarter-io/keystone,dims/keystone,dstanek/keystone,roopali8/keystone,rushiagr/keystone,cernops/keystone,rushiagr/keystone,promptworks/keystone,rajalokan/keystone,MaheshIBM/keystone,klmitch/keystone,reeshupatel/demo,dstanek/keystone,reeshupatel/demo,mahak/keystone,rushiagr/keystone,dims/keystone,jonnary/keystone,openstack/keystone,rodrigods/keystone,himanshu-setia/keystone,takeshineshiro/keystone,mahak/keystone