Pin the ES/Kibana to 5.x as a current one

- Prevent getting all apt_mcp ES/Kibana repos. Instead, add only 5x.
- Set ES/Kibana version to the major '5'.

Change-Id: I80046b738a70435044076ee95c40f4de40b8da20
Related-Bug: PROD-18541
diff --git a/classes/cluster/virtual-mcp-mitaka-ovs/stacklight/server.yml b/classes/cluster/virtual-mcp-mitaka-ovs/stacklight/server.yml
index 6c50766..9980eac 100644
--- a/classes/cluster/virtual-mcp-mitaka-ovs/stacklight/server.yml
+++ b/classes/cluster/virtual-mcp-mitaka-ovs/stacklight/server.yml
@@ -2,8 +2,8 @@
 - system.docker.host
 - system.linux.system.repo.influxdb
 - system.linux.system.repo.mcp.salt
-- system.linux.system.repo.mcp.apt_mirantis.elastic
-- system.linux.system.repo.mcp.apt_mirantis.kibana
+- system.linux.system.repo.mcp.apt_mirantis.elastic.5x
+- system.linux.system.repo.mcp.apt_mirantis.kibana.5x
 - system.linux.system.repo.docker
 - system.heka.remote_collector.container
 - system.heka.remote_collector.input.amqp
@@ -33,6 +33,8 @@
   _param:
     heka_amqp_host: ${_param:openstack_control_address}
     kibana_elasticsearch_host: ${_param:stacklight_monitor_address}
+    elasticsearch_version: 5
+    kibana_version: 5
     keepalived_prometheus_vip_address: ${_param:stacklight_monitor_address}
     keepalived_prometheus_vip_password: 'password'
     keepalived_prometheus_vip_interface: ens4