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/sl_k8s_calico/stacklight/server.yml b/classes/cluster/sl_k8s_calico/stacklight/server.yml
index 4295be4..201f5ee 100644
--- a/classes/cluster/sl_k8s_calico/stacklight/server.yml
+++ b/classes/cluster/sl_k8s_calico/stacklight/server.yml
@@ -53,6 +53,9 @@
     cluster_node02_address: ${_param:stacklight_monitor_node02_address}
     cluster_node03_hostname: ${_param:stacklight_monitor_node03_hostname}
     cluster_node03_address: ${_param:stacklight_monitor_node03_address}
+    # Galera
+    galera_innodb_buffer_pool_size: 1024M
+    galera_max_connections: 200
     # Kibana
     kibana_elasticsearch_host: ${_param:cluster_vip_address}
     # Galera