Remove obsolete/incorrect install instructions
Remove obsolete/incorrect install instructions

Remove obsolete installation instructions for devstack, and
added corrected versions for manual install.

Change-Id: I7b9f8d8c508406ba432d41b0ef58c4f407551395

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