Updated openstack/openstack
Project: openstack-dev/devstack  f35b4a75056b7019ebf30ac9775976f8ff43074f
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fixup_stuff prettytable min version

The minimum prettytable version is changed from 0.6 to 0.7
 in the global requirements.

If the system has an older prettytable version the fixup_stuff does not
takes effect in time, because at fixup time the system has the old
version.

Ensure the fixup installs the minimum required version in time.

Change-Id: If1737dacb25db73b68e707953d05576ad8a97da7