Updated openstack/openstack
Project: openstack/requirements  6cbf9104a0d26f95cfe5cdd7d86ee76f5d485ba1
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HTTPretty: update to 0.7.1

The 0.7.1 release has a fix for the parse_querystring function, which raised a
TypeError on Python 3.3. See:

https://github.com/gabrielfalcao/HTTPretty/commit/5c6e776

This helps fix some tests on Python3.3 in python-keystoneclient.

Change-Id: If14a0afe9d42602e978377d6f6ee830affe0cc41