salt.modules.ceph: Use format not substitution
salt.modules.ceph: Use format not substitution

We should use new style format in salt code.

Signed-off-by: Owen Synge <ea78e0e20fce5319fd66b8fd4f543d9e30ef46a5@suse.com>

saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt,saltstack/salt