Fix a comment in SLO middleware
Fix a comment in SLO middleware

Change-Id: I6ef435db55eb6cac5a92d9ef0f7ac3eaf271761d

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