Enable oslo.cache library

Add glance:server: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_node01_address}
          port: 11211

Enable oslo.cache in the glance config files:
 - glance-api.conf
 - glance-registry.conf

Change-Id: I0d183ea7e551b59cea5ff125d550cd5f5914239e
Related-Prod: PROD-26960
diff --git a/tests/pillar/cluster.sls b/tests/pillar/cluster.sls
index 35d5f62..45adbdb 100644
--- a/tests/pillar/cluster.sls
+++ b/tests/pillar/cluster.sls
@@ -60,6 +60,10 @@
       user_storage: 0
     cache:
       engine: memcached
+      expiration_time: 600
+      backend_argument:
+        memcached_expire_time:
+          value: 660
       members:
       - host: 127.0.0.1
         port: 11211