Updated error message for keystone-manage2
Updated error message for keystone-manage2

Change-Id: I731ae211ead97cc3d7a1e8f281b67ce4ae9f7b3b

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