Swift middleware doc update.
Swift middleware doc update.

Change-Id: I01ecc4d602b5e887f66d32676f11a92d022f693f

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