3da7a036d9
This is motivated by the recent change of rally project [1] which states that In-tree OpenStack plugins will be removed from the Rally main package soon. Also, we do not have constraint for it, we need to pin it to keep consistent build. [1] https://github.com/openstack/rally/blob/master/CHANGELOG.rst#100---2018-06-20 Change-Id: I9121867301fc69ba6623110fa6e54c2da0b5ae2c Closes-Bug: 1782372