Python 3: fix urllib import
Python 3: fix urllib import

Replace urllib.quote import with six.moves.urllib.parse.quote, so the
code works on Python 2 and Python 3.

Change-Id: I17e9cd9668661b6a67f33db83e0cbfc8ea6e3ca6

clayg/swift,hurricanerix/swift,swiftstack/swift,hurricanerix/swift,openstack/swift,matthewoliver/swift,matthewoliver/swift,psachin/swift,hurricanerix/swift,swiftstack/swift,redbo/swift,nadeemsyed/swift,notmyname/swift,matthewoliver/swift,clayg/swift,openstack/swift,clayg/swift,smerritt/swift,psachin/swift,smerritt/swift,clayg/swift,psachin/swift,nadeemsyed/swift,tipabu/swift,notmyname/swift,swiftstack/swift,larsbutler/swift,smerritt/swift,prashanthpai/swift,nadeemsyed/swift,openstack/swift,tipabu/swift,larsbutler/swift,notmyname/swift,matthewoliver/swift,notmyname/swift,tipabu/swift,redbo/swift,prashanthpai/swift,nadeemsyed/swift,smerritt/swift,openstack/swift,psachin/swift,hurricanerix/swift,tipabu/swift