Updated openstack/openstack
Project: openstack/python-glanceclient  47de9cfd89bc711a49c6cd1e7a6665bb66c14d4a
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Python 3: use six.iteritems() instead of iteritems()

Six.iteritems() replaces dictionary.iteritems() on Python 2 and
dictionary.items() on Python 3.

Change-Id: I12fda5f20d2f4fe8227e45b2fe46b332f63deb97