Merge pull request #603 from bengland2/fix_purge_nonosd

fix purge-request.yml so non-OSD hosts will not fail

purge-cluster.yml

@@ -43,11 +43,9 @@
 
   tasks:
   - name: get osd numbers
-    shell: ls /var/lib/ceph/osd | cut -d "-" -f 2
+    shell: "if [ -d /var/lib/ceph/osd ] ; then ls /var/lib/ceph/osd | cut -d '-' -f 2 ; fi"
     register: osd_ids
     changed_when: false
-    when:
-     osd_group_name in group_names
 
 # Infernalis
   - name: stop ceph.target with systemd