ceph-mon: no need to include playbook_dir when fetching configs

This causes a bug when fetch_directory is not a relative path to the
playbook location.

Signed-off-by: Andrew Schoen <aschoen@redhat.com>

roles/ceph-mon/tasks/docker/fetch_configs.yml

@@ -21,7 +21,7 @@
 
 - name: try to fetch ceph config and keys
   copy:
-    src: "{{ playbook_dir }}/{{ fetch_directory }}/docker_mon_files/{{ item.0 }}"
+    src: "{{ fetch_directory }}/docker_mon_files/{{ item.0 }}"
     dest: "{{ item.0 }}"
     owner: root
     group: root