Correct revocation event test for domain_id
Correct revocation event test for domain_id

The revocation event test used "user_domain_id" and
"project_domain_id" as token fields that the "domain_id"
revocation event field maps to, but the token fields are
actually "identity_domain_id" and "assignment_domain_id", as
can be seen in
keystone.contrib.revoke.model.build_token_values().

Change-Id: I208484da243403287eaa33893d57429c7e6d27c7
Partial-Bug: #1349597

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