Added to requirements:
https://review.openstack.org/309084
Functional tests were added
https://review.openstack.org/265811
But they still use the version of python-brick-cinderclient-ext from pip.
This change updates devstack to pull in the changes from
python-brick-cinderclient-ext patch sets instead, when configured to do so.
Change-Id: I6d0f09950ea1200d3367a53aa4a3eea9be7abc66
Needed-by: I34f3b5ceaad7a50b1e9cadcc764f61c0aabe086d