add git commit date / sha1 to sphinx html docs
add git commit date / sha1 to sphinx html docs

Change-Id: If47cee942707d2c36b0b897470b7ec994f0e259a

bouncestorage/swift,bradleypj823/swift,Seagate/swift,swiftstack/swift,wenhuizhang/swift,redbo/swift,iostackproject/IO-Bandwidth-Differentiation,hbhdytf/mac,notmyname/swift,takeshineshiro/swift,openstack/swift,orion/swift-config,anishnarang/gswift,nadeemsyed/swift,williamthegrey/swift,daasbank/swift,levythu/swift,larsbutler/swift,psachin/swift,Triv90/SwiftUml,citrix-openstack/build-swift,Em-Pan/swift,eatbyte/Swift,dencaval/swift,notmyname/swift,mjwtom/swift,hbhdytf/mac,openstack/swift,clayg/swift,tsli/test,Mirantis/swift-encrypt,dencaval/swift,nadeemsyed/swift,zackmdavis/swift,redhat-openstack/swift,citrix-openstack/build-swift,smerritt/swift,orion/swift-config,bouncestorage/swift,prashanthpai/swift,xiaoguoai/ec-dev-swift,hurricanerix/swift,openstack/swift,sarvesh-ranjan/swift,NewpTone/StackLab-swift,sarvesh-ranjan/swift,eatbyte/Swift,hbhdytf/mac2,hbhdytf/mac2,aerwin3/swift,redbo/swift,clayg/swift,notmyname/swift,tipabu/swift,NewpTone/StackLab-swift,hbhdytf/mac2,AfonsoFGarcia/swift,AfonsoFGarcia/swift,tipabu/swift,prashanthpai/swift,smerritt/swift,citrix-openstack-build/swift,clayg/swift,shibaniahegde/OpenStak_swift,daasbank/swift,dpgoetz/swift,Mirantis/swift-encrypt,rackerlabs/swift,JioCloud/swift,Khushbu27/Tutorial,thiagodasilva/swift,nadeemsyed/swift,nadeemsyed/swift,VictorLowther/swift,psachin/swift,hurricanerix/swift,NeCTAR-RC/swift,williamthegrey/swift,Akanoa/swift,revoer/keystone-8.0.0,maginatics/swift,Triv90/SwiftUml,revoer/keystone-8.0.0,larsbutler/swift,JioCloud/swift,notmyname/swift,citrix-openstack-build/swift,dpgoetz/swift,zackmdavis/swift,hurricanerix/swift,clayg/swift,scality/ScalitySproxydSwift,iostackproject/IO-Bandwidth-Differentiation,maginatics/swift,hbhdytf/mac2,psachin/swift,Akanoa/swift,swiftstack/swift,VictorLowther/swift,redhat-openstack/swift,zaitcev/swift-lfs,tipabu/swift,thiagodasilva/swift,shibaniahegde/OpenStak_swift,Em-Pan/swift,bradleypj823/swift,matthewoliver/swift,mjwtom/swift,psachin/swift,smerritt/swift,wenhuizhang/swift,aerwin3/swift,zaitcev/swift-lfs,anishnarang/gswift,scality/ScalitySproxydSwift,xiaoguoai/ec-dev-swift,smerritt/swift,bkolli/swift,bkolli/swift,matthewoliver/swift,takeshineshiro/swift,mjzmjz/swift,matthewoliver/swift,Seagate/swift,tipabu/swift,gold3bear/swift,openstack/swift,Khushbu27/Tutorial,levythu/swift,rackerlabs/swift,mjzmjz/swift,gold3bear/swift,tsli/test,IPVL/swift-kilo,swiftstack/swift,NeCTAR-RC/swift,matthewoliver/swift,IPVL/swift-kilo,hurricanerix/swift