Fix unless condition for ceph-deploy

In case of using an array parameter in Exec {unless}, it will run only if all
commands are false. However, we need to execute it if any of conditional
commands is false.

Change-Id: I002c734ffdbd6e6f69ff83c5f98e503e09503356
Closes-bug: #1565703
(cherry picked from commit f95c6344dc)

deployment/puppet/ceph/manifests/mon.pp

@@ -30,9 +30,9 @@ class ceph::mon (
 
   exec {'ceph-deploy gatherkeys':
     command   => "ceph-deploy gatherkeys ${node_hostname}",
-    unless    => ['test -f /root/ceph.bootstrap-mds.keyring',
-                  'test -f /root/ceph.bootstrap-osd.keyring',
-                  'test -f /root/ceph.client.admin.keyring',
+    unless    => ['test -f /root/ceph.bootstrap-mds.keyring \
+                     -a -f /root/ceph.bootstrap-osd.keyring \
+                     -a -f /root/ceph.client.admin.keyring',
                  ],
     try_sleep => 5,
     tries     => 6,