Remove kvs backend from oauth1 extension
Remove kvs backend from oauth1 extension

Suggest removing this backend, it's not production worthy.

Change-Id: I9b259fa553d8e5b94c0eb36bb5d1dc5b33508486

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