Updated openstack/openstack
Project: openstack/requirements  54f4b21fb53d007c385e282d01745a7f68504928

Relunctantly removing stackforge/solum from projects.txt

We can't use python-mistralclient because:
https://review.openstack.org/102738

Rejection of taht patch means that we can not merge our Mistral
related code without removing ourselves form projects.txt. Our
gate jobs will not pass unless all of our requirements are in
global-requirements.txt, so until python-mistralclient makes its
way in there, we can not be part of projects.txt.

Change-Id: I2c5fe5777e5a8ba6cd81a5f76a0c6e77dd2ff8f6