made identity.py pep8 compliant
made identity.py pep8 compliant

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