Ceph doesnt install from source on RPM because Ceph pulls in
python-requests. This causes a cpio error during unpacking
because requests is installed in the base image. A simple
workaround is to remove in the nova-compute container which
is the only container this conflict occurs within.
backport: liberty
Change-Id: I493900854a53c98f1a5cb6478675a18feceefea5
Closes-Bug: #1508236
194bb93ff2