make drive audit regexes detect 4-letter drives
make drive audit regexes detect 4-letter drives

addresses bug 827913

Change-Id: I691eee191f5951186158c553281f88aae9e5d25f

redbo/swift,Triv90/SwiftUml,tsli/test,zaitcev/swift-lfs,hurricanerix/swift,psachin/swift,revoer/keystone-8.0.0,VictorLowther/swift,clayg/swift,bradleypj823/swift,levythu/swift,revoer/keystone-8.0.0,wenhuizhang/swift,levythu/swift,zackmdavis/swift,wenhuizhang/swift,ceph/swift,AfonsoFGarcia/swift,openstack/swift,bkolli/swift,mjwtom/swift,psachin/swift,hurricanerix/swift,IPVL/swift-kilo,nadeemsyed/swift,iostackproject/IO-Bandwidth-Differentiation,bradleypj823/swift,sarvesh-ranjan/swift,mja054/swift_plugin,matthewoliver/swift,thiagodasilva/swift,ceph/swift,hbhdytf/mac2,JioCloud/swift,clayg/swift,iostackproject/IO-Bandwidth-Differentiation,Triv90/SwiftUml,openstack/swift,tipabu/swift,SUSE/swift,Mirantis/swift-encrypt,psachin/swift,SUSE/swift,dencaval/swift,NewpTone/StackLab-swift,sarvesh-ranjan/swift,smerritt/swift,citrix-openstack-build/swift,williamthegrey/swift,hbhdytf/mac,redbo/swift,matthewoliver/swift,tipabu/swift,bouncestorage/swift,shibaniahegde/OpenStak_swift,rackerlabs/swift,prashanthpai/swift,larsbutler/swift,prashanthpai/swift,IPVL/swift-kilo,swiftstack/swift,zaitcev/swift-lfs,NewpTone/StackLab-swift,hbhdytf/mac,rackerlabs/swift,xiaoguoai/ec-dev-swift,Khushbu27/Tutorial,hbhdytf/mac2,Intel-bigdata/swift,zackmdavis/swift,redhat-openstack/swift,Seagate/swift,matthewoliver/swift,tsli/test,eatbyte/Swift,mja054/swift_plugin,aerwin3/swift,shibaniahegde/OpenStak_swift,citrix-openstack-build/swift,gold3bear/swift,nadeemsyed/swift,smerritt/swift,daasbank/swift,smerritt/swift,eatbyte/Swift,hbhdytf/mac2,larsbutler/swift,mjwtom/swift,Em-Pan/swift,orion/swift-config,mjzmjz/swift,psachin/swift,VictorLowther/swift,anishnarang/gswift,smerritt/swift,daasbank/swift,notmyname/swift,dpgoetz/swift,hurricanerix/swift,citrix-openstack/build-swift,maginatics/swift,swiftstack/swift,dencaval/swift,notmyname/swift,Mirantis/swift-encrypt,takeshineshiro/swift,Akanoa/swift,takeshineshiro/swift,matthewoliver/swift,redhat-openstack/swift,AfonsoFGarcia/swift,maginatics/swift,xiaoguoai/ec-dev-swift,Em-Pan/swift,mjzmjz/swift,clayg/swift,bouncestorage/swift,orion/swift-config,clayg/swift,hbhdytf/mac2,openstack/swift,anishnarang/gswift,Akanoa/swift,tipabu/swift,thiagodasilva/swift,Khushbu27/Tutorial,openstack/swift,JioCloud/swift,swiftstack/swift,williamthegrey/swift,dpgoetz/swift,scality/ScalitySproxydSwift,gold3bear/swift,citrix-openstack/build-swift,aerwin3/swift,mja054/swift_plugin,hurricanerix/swift,bkolli/swift,tipabu/swift,scality/ScalitySproxydSwift,NeCTAR-RC/swift,notmyname/swift,nadeemsyed/swift,notmyname/swift,Intel-bigdata/swift,Seagate/swift,nadeemsyed/swift,NeCTAR-RC/swift