Don't delete containers when they weren't created.
Don't delete containers when they weren't created.

When swift-bench is run in direct mode, don't try to delete the
containers which weren't created.

Fixes bug 1177960.

Change-Id: Ice07e8729bb776e2b215894cf95fb80b64167a8d

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