Enable oslo.cache library

Add manila:common:cache metadata

      cache:
        engine: memcached
        expiration_time: 600
        backend_argument:
          memcached_expire_time:
            value: 660
        members:
        - host: ${_param:cluster_node01_address}
          port: 11211
        - host: ${_param:cluster_node02_address}
          port: 11211
        - host: ${_param:cluster_node03_address}
          port: 11211

Enable oslo.cache in the manila.conf file

Related-Prod: PROD-28614, PROD-26960

Change-Id: Ie8f5ccf320394d5052aeffbeb5a111230ae9bed7
diff --git a/tests/pillar/server_cluster.sls b/tests/pillar/server_cluster.sls
index bae2402..4e6ab2c 100644
--- a/tests/pillar/server_cluster.sls
+++ b/tests/pillar/server_cluster.sls
@@ -23,6 +23,10 @@
       password: misterio
     cache:
       engine: memcached
+      expiration_time: 600
+      backend_argument:
+        memcached_expire_time:
+          value: 660
       members:
         - host: 127.0.0.1
         - host: 127.0.0.1