This reverts commit 0014c0c3734e8d344e4a45e127fbd0c86dcfaf3c.
This is handled generically now with this change and its dependency:
https://review.openstack.org/#/c/606853/
Change-Id: I360211cf60afb5611fb9e77fe6332fa59159708f
In order to get openstack/placement installed as part of the
neutron grenade jobs, we have to list it as a required project.
Needed by https://review.openstack.org/604454/
Change-Id: I742660f398b52c62503acf00aaf7faa9a5a8650a