Implement log directory link checking

This change implements the log directory link checking. This will ensure
the role is able to handle instances where memcached is deployed outside
of a container using the "is_metal: true" property from OSA.

Change-Id: Ia5e38dd1fda9f7fa5876e0a2824c88d0fa3d2b8d
Signed-off-by: Kevin Carter <kevin.carter@rackspace.com>

tasks/memcached_config.yml

@@ -13,10 +13,23 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-- name: Ensure logging folder exists
+- name: Test for log directory or link
+  shell: |
+    if [ -h "{{ memcached_log | dirname }}"  ]; then
+      chown -h root:root "{{ memcached_log | dirname }}"
+      chown -R root:root "$(readlink {{ memcached_log | dirname }})"
+    else
+      exit 1
+    fi
+  register: log_dir
+  failed_when: false
+  changed_when: log_dir.rc != 0
+
+- name: Create memcached log dir
   file:
     path: "{{ memcached_log | dirname }}"
     state: directory
+  when: log_dir.rc != 0
 
 - name: Apply memcached config
   template: