Removing attribute duplicated from superclass; causes an issue in py 2.7
Removing attribute duplicated from superclass; causes an issue in py 2.7

Change-Id: I9241b3d0869a4e37910c7de57ff04da0f98f74d8

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