Updated openstack/openstack
Project: openstack/python-ceilometerclient  d663570b775bf429c9f6b183d1e7809e4d4a1b2d
null
Python 3: use six.moves.zip() rather than itertools.izip()

This ensures compatibility with both Python 2 and Python 3.

Change-Id: Id9838b7517f939e5ee3e3a8c37ae5ec2e9b1d18b