Demonstrate that authenticate() returns roles.
Demonstrate that authenticate() returns roles.

This is related to lp 1035428; that bug is fixed in folsom,
but this test is also about to appear in stable/essex.

Change-Id: Iadd4091339aab2c3a8d474b44dcd11f8bfd1d510

rodrigods/keystone,ntt-sic/keystone,savi-dev/keystone,promptworks/keystone,jumpstarter-io/keystone,cbrucks/Federated_Keystone,idjaw/keystone,rajalokan/keystone,jonnary/keystone,klmitch/keystone,cloudbau/keystone,savi-dev/keystone,dims/keystone,openstack/keystone,cbrucks/Federated_Keystone,dsiddharth/access-keys,reeshupatel/demo,cernops/keystone,maestro-hybrid-cloud/keystone,jumpstarter-io/keystone,kwss/keystone,ilay09/keystone,klmitch/keystone,nuxeh/keystone,townbull/keystone-dtrust,cernops/keystone,jamielennox/keystone,takeshineshiro/keystone,vivekdhayaal/keystone,reeshupatel/demo,ntt-sic/keystone,openstack/keystone,UTSA-ICS/keystone-kerberos,jumpstarter-io/keystone,maestro-hybrid-cloud/keystone,mahak/keystone,ilay09/keystone,citrix-openstack-build/keystone,dims/keystone,dstanek/keystone,jamielennox/keystone,ging/keystone,rushiagr/keystone,dsiddharth/access-keys,MaheshIBM/keystone,rushiagr/keystone,nuxeh/keystone,rickerc/keystone_audit,rajalokan/keystone,openstack/keystone,rickerc/keystone_audit,vivekdhayaal/keystone,JioCloud/keystone,ging/keystone,citrix-openstack-build/keystone,ajayaa/keystone,JioCloud/keystone,vivekdhayaal/keystone,dstanek/keystone,nuxeh/keystone,rajalokan/keystone,ntt-sic/keystone,blueboxgroup/keystone,derekchiang/keystone,dsiddharth/access-keys,cloudbau/keystone,roopali8/keystone,kwss/keystone,roopali8/keystone,dstanek/keystone,citrix-openstack-build/keystone,savi-dev/keystone,promptworks/keystone,himanshu-setia/keystone,MaheshIBM/keystone,himanshu-setia/keystone,cloudbau/keystone,ilay09/keystone,mahak/keystone,idjaw/keystone,blueboxgroup/keystone,promptworks/keystone,mahak/keystone,townbull/keystone-dtrust,derekchiang/keystone,rushiagr/keystone,reeshupatel/demo,derekchiang/keystone,UTSA-ICS/keystone-kerberos,townbull/keystone-dtrust,ajayaa/keystone,takeshineshiro/keystone,kwss/keystone,rodrigods/keystone,rickerc/keystone_audit,jonnary/keystone,cbrucks/Federated_Keystone