add keystone configuration instructions to manual install docs
add keystone configuration instructions to manual install docs

Change-Id: I50aed064580a715b741e4ecf6bb7e74bdcdfd514
Fixes: bug 1104062

sileht/aodh,maestro-hybrid-cloud/ceilometer,isyippee/ceilometer,rackerlabs/instrumented-ceilometer,rackerlabs/instrumented-ceilometer,fabian4/ceilometer,mathslinux/ceilometer,NeCTAR-RC/ceilometer,idegtiarov/ceilometer,r-mibu/ceilometer,mathslinux/ceilometer,openstack/aodh,NeCTAR-RC/ceilometer,tanglei528/ceilometer,dreamhost/ceilometer,ityaptin/ceilometer,MisterPup/Ceilometer-Juno-Extension,isyippee/ceilometer,shootstar/ctest,tanglei528/ceilometer,luogangyi/Ceilometer-oVirt,rickerc/ceilometer_audit,m1093782566/openstack_org_ceilometer,dreamhost/ceilometer,JioCloud/ceilometer,Juniper/ceilometer,idegtiarov/ceilometer,JioCloud/ceilometer,maestro-hybrid-cloud/ceilometer,pczerkas/aodh,rickerc/ceilometer_audit,eayunstack/ceilometer,citrix-openstack-build/ceilometer,openstack/aodh,citrix-openstack-build/ceilometer,Juniper/ceilometer,ityaptin/ceilometer,pczerkas/aodh,cernops/ceilometer,citrix-openstack-build/ceilometer,NeCTAR-RC/ceilometer,pkilambi/ceilometer,chungg/aodh,rackerlabs/instrumented-ceilometer,MisterPup/Ceilometer-Juno-Extension,pkilambi/ceilometer,JioCloud/ceilometer,r-mibu/ceilometer,froyobin/ceilometer,openstack/ceilometer,m1093782566/openstack_org_ceilometer,shootstar/ctest,redhat-openstack/ceilometer,luogangyi/Ceilometer-oVirt,eayunstack/ceilometer,redhat-openstack/ceilometer,rickerc/ceilometer_audit,sileht/aodh,cernops/ceilometer,openstack/ceilometer,froyobin/ceilometer,tanglei528/ceilometer,fabian4/ceilometer,chungg/aodh