Fix RGW key fetching

In a previous commit, key name changed, fixing this.

Signed-off-by: Sébastien Han <sebastien.han@enovance.com>

roles/ceph-radosgw/tasks/main.yml

@@ -1,10 +1,10 @@
 ---
 - name: Copy RGW bootstrap key
-  copy: src=fetch/{{ fsid }}/etc/ceph/keyring.radosgw.gateway dest=/etc/ceph/keyring.radosgw.gateway owner=root group=root mode=600
+  copy: src=fetch/{{ fsid }}/etc/ceph/radosgw.gateway.keyring dest=/etc/ceph/radosgw.gateway.keyring owner=root group=root mode=600
   when: cephx
 
 - name: Set RGW bootstrap key permissions
-  file: path=/etc/ceph/keyring.radosgw.gateway mode=0600 owner=root group=root
+  file: path=/etc/ceph/radosgw.gateway.keyring mode=0600 owner=root group=root
   when: cephx
 
 ## Check OS family