Add more service types to avoid salt-minon exception

If ceph-fuse is deployed, a socket named "ceph-client.admin.asok" would appear under
`/var/run/ceph`, and cause current code AttributeError. So this patch will
1) add "client" to the regular expression matching pattern
2) ignore AttributeError from method service_status(), to avoid potential errors in future
Can we come up with a regex that doesn't hardcode a list of service types?  This is already missing e.g. rgw and anything we might add in the future.

Originally the service type was a ".+", but it was changed in order to handle service names that had dashes or dots (I forget which) in them (see git history for this file).  Can we come up with something that handles that case without hardcoding the service types?