Do lookups for user, project

This required https://review.openstack.org/26323 in keystoneclient

Change-Id: I55bededbc20b5dcf2833c59eb2b6b069703d8a9a
Begin Python 3 compatability

* use six.iteritems()
* replace basestring with six.string_types
* convert print statements to functions (they're all debugging and should
  be removed eventually anyway)

* clean up OpenStack copyright: LLC -> Foundation

Change-Id: Icb14212bcb408e63816bfec3922a697bc1a6c946
Merge branch 'py33' into dt-test
Merge branch 'volume-keystone' into dt-test