Use /var/lib/ceph/osd folder to filter osd mount point

In some case, use may mount a partition to /var/lib/ceph, and umount
it will be failure and no need to do so too.

Signed-off-by: Jeffrey Zhang <zhang.lei.fly@gmail.com>
(cherry picked from commit 85cc61a6d9)

infrastructure-playbooks/purge-cluster.yml

@@ -222,9 +222,7 @@
       timeout: 500
 
   - name: remove data
-    file:
+    command: rm -rf /var/lib/ceph/*
-     path: /var/lib/ceph
-     state: absent
 
   tasks:
 
@@ -275,7 +273,7 @@
     register: encrypted_ceph_partuuid
 
   - name: get osd data and lockbox mount points
-    shell: "(grep /var/lib/ceph /proc/mounts || echo -n) | awk '{ print $2 }'"
+    shell: "(grep /var/lib/ceph/osd /proc/mounts || echo -n) | awk '{ print $2 }'"
     register: mounted_osd
     changed_when: false
 
@@ -525,7 +523,7 @@
 
   handlers:
   - name: get osd data and lockbox mount points
-    shell: "(grep /var/lib/ceph /proc/mounts || echo -n) | awk '{ print $2 }'"
+    shell: "(grep /var/lib/ceph/osd /proc/mounts || echo -n) | awk '{ print $2 }'"
     register: mounted_osd
     changed_when: false
     listen: "remove data"