init-ceph: return success error code on missing ceph.conf if no -c
init-ceph: return success error code on missing ceph.conf if no -c

This will avoid errors when installing/removing the unconfigured
package.

ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph,ajnelson/ceph