Fixed minor pylint issues
Fixed minor pylint issues

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