Due to changes with the drop-root work, we lost the ability to write
to /var/lib/nova/*. This fixes those permissions and ensures cross
container talk works properly between nova_libvirt and nova_compute

Additionally, this fixes another issue introduced which saw that
nova-compute could not run sudo commands as it did not have a proper
sudoers entry

Testing from previous deploys means you need a fresh environment. You
have to remove all of the named volumes that kolla created in docker.
Check these with `docker volume ls`

Signed-off-by: Hui Kang <kangh@us.ibm.com>
Signed-off-by: Artur Zarzycki <azarzycki@mirantis.com>
Co-Authored-By: Sam Yaple <sam@yaple.net>
Co-Authored-By: Hui Kang <kangh@us.ibm.com>
Closes-Bug: #1533350
Change-Id: I7f864c448a2414e0b5d89f48337be411b891df35