Use RDO version of python-msgpack on RDO
Use RDO version of python-msgpack on RDO

python2-msgpack is python2 only, is from EPEL, and is ancient.

Use a propery tested and validated version of msgpack.

Closes-Bug: #1704894
Co-Authored-By: Jeffrey Zhang <54a2bb1485674e5aaaa58762abfc743b2092c3ad@99cloud.net>
Change-Id: I3b33f7a9ad48e2a06ede1f79426231d720b851ae

rahulunair/kolla,openstack/kolla,openstack/kolla,stackforge/kolla,stackforge/kolla,rahulunair/kolla,stackforge/kolla