Set default TTL for memcache item expiration

Fixes: PROD-26960

Change-Id: I8880277c1c0fa3b6cbea1c26fcdf09d13b92a5e8
(cherry picked from commit 25b53070d6d625c58fb4a92728130b6122caae98)

Enable default TTL for memcache item expiration

Includes oslo_templates/files/queens/oslo/_cache.conf file
in the [cache] section of nova.conf

Change-Id: I7e6ed812cc95cb492b255171c12314d89a8343de
Related-Prod: PROD-26960
(cherry picked from commit 068f1534282f5f1d0a8be86c9425e6e5a20d48f4)
diff --git a/tests/pillar/compute_cluster_vmware_queens.sls b/tests/pillar/compute_cluster_vmware_queens.sls
index b704198..006dc1a 100644
--- a/tests/pillar/compute_cluster_vmware_queens.sls
+++ b/tests/pillar/compute_cluster_vmware_queens.sls
@@ -56,6 +56,10 @@
       password: metadata
     cache:
       engine: memcached
+      expiration_time: 600
+      backend_argument:
+        memcached_expire_time:
+          value: 660
       members:
       - host: 127.0.0.1
         port: 11211