Pin neutron-fwaas to the last working commit
Pin neutron-fwaas to the last working commit

neutron-fwaas has been removed upstream [1]. Until we can get it retired
from everywhere, let's pin it to the last working commit.

[1] https://review.opendev.org/#/c/735829/

Change-Id: Ia0d50f43c5165720fe51e7c42597774fa407ec9c

redhat-openstack/rdoinfo