This PS updates the ceph charts to make /etc/ceph an emptydir
uniformly across all charts, both ensuring no default config is loaded,
and also permitting read-only filesystems to back the containers.
Additionally /run is uniformly applied across all long running pods
as a memory backed emptydir.
Change-Id: I00d1b15758b7eb4476fb950ddcb38db9a5149ad0
Signed-off-by: Pete Birley <pete@port.direct>