Additional info log message for drive-audit
Additional info log message for drive-audit

An additional info log message was added for case of
running drive-audit without failed device unmounting.

Change-Id: I11abee40a712b6c6de65e63626b6f7f0a9c9f4c7

openstack/swift,larsbutler/swift,revoer/keystone-8.0.0,swiftstack/swift,aerwin3/swift,prashanthpai/swift,psachin/swift,redbo/swift,notmyname/swift,matthewoliver/swift,smerritt/swift,hurricanerix/swift,prashanthpai/swift,larsbutler/swift,smerritt/swift,aerwin3/swift,clayg/swift,tipabu/swift,smerritt/swift,psachin/swift,swiftstack/swift,williamthegrey/swift,psachin/swift,swiftstack/swift,hurricanerix/swift,nadeemsyed/swift,notmyname/swift,notmyname/swift,tipabu/swift,hurricanerix/swift,redbo/swift,smerritt/swift,nadeemsyed/swift,clayg/swift,hurricanerix/swift,nadeemsyed/swift,openstack/swift,openstack/swift,matthewoliver/swift,psachin/swift,tipabu/swift,williamthegrey/swift,notmyname/swift,tipabu/swift,clayg/swift,nadeemsyed/swift,openstack/swift,matthewoliver/swift,matthewoliver/swift,clayg/swift,revoer/keystone-8.0.0