Use Oslo module py3kcompat

Module py3kcompat can be used to make libraries urllib urllib2 urlparse
Python3 compatible. This patch aslo add file openstack-common.conf to
track files from Olso-incubator as we did in other projects.

Change-Id: I8973672c469ffd264e01fe26a4d265f89f7d1755
Replace urllib with py3kcompat.urlutils

This patch replaces urllib.* with py3kcompat.urlutils.* to make
code Python 3 compatible.

Part of blueprint py33

Change-Id: Iada39d9ed4003ce975611e06e79f667ff0b07704
Replace urlparse with py3kcompat.urlutils

Replace urlparse.* with py3kcompat.urlutils.* to make
code Python 3 compatible.

Part of blueprint py33

Change-Id: Ie4c9c6f3b4d7ebfb03428edac1f8222ec1e7506b
Merge "Use Oslo module py3kcompat"
Merge "Replace urllib with py3kcompat.urlutils"
Merge "Replace urlparse with py3kcompat.urlutils"