add command for test database to readme
add command for test database to readme

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