Reduce max_connections and innodb_buffer_pool_size for K8S envs

To reduce RAM usage , as far as Galera is used only for Grafana
in kubernetes environments.

Change-Id: I6e45e2e4ce9a67d5c20539049e97807338d4f49e
diff --git a/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml b/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml
index fc1dc29..efb1a16 100644
--- a/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml
+++ b/classes/cluster/virtual-mcp11-k8s-calico/stacklight/server.yml
@@ -55,6 +55,8 @@
     kibana_elasticsearch_host: ${_param:cluster_vip_address}
     # Galera
     openstack_version: newton
+    galera_innodb_buffer_pool_size: 1024M
+    galera_max_connections: 200
     # Grafana
     grafana_database_type: mysql
     grafana_database_host: ${_param:cluster_vip_address}