Updated openstack/openstack
Project: openstack/requirements  846fc6eee1788449d18771e266e67bbf0303b536

Remove devstack/devstack-gate from projects

Repo devstack-gate has a requirements file but no setup.py, so we cannot
gate for changes there. Remove it from the list so that a broken
file will not break the requirements post job.
Similar for devstack.

Change-Id: I19049439e497f549313fe162ded2f696f679ec8c