Typo fix for radosgw@ systemd file
Typo fix for radosgw@ systemd file

systemd script for radosgw is radosgw@ not rgw@, the directory needs to
match the path.

ceph/ceph-ansible,fgal/ceph-ansible,travmi/ceph-ansible,fgal/ceph-ansible,jtaleric/ceph-ansible,font/ceph-ansible,font/ceph-ansible,jtaleric/ceph-ansible,travmi/ceph-ansible,ceph/ceph-ansible