added printing of 404s to dispersion report; fixed small, unrelated bug
added printing of 404s to dispersion report; fixed small, unrelated bug

also fixed bug where in error_log where identifier wasn't being set to anything meaningful, set it to the right thing

bug 612722

Change-Id: I53f237ea0db2a5b2b8979a7b41189faf1275e861

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