Add Kibana 6 support

Modify files structure to version based
Remove predefined version from formula
Update tests to use mirror.mirantis.com repos
Update tests to use Kibana 5

Change-Id: I421396f351d6205b91004d18398bd9000335665c
Prod-Related: PROD-25123
diff --git a/tests/pillar/kibana_client.sls b/tests/pillar/kibana_client.sls
index a4d7cb7..108a9aa 100644
--- a/tests/pillar/kibana_client.sls
+++ b/tests/pillar/kibana_client.sls
@@ -1,11 +1,12 @@
 kibana:
   client:
     enabled: true
+    version: 5
     default_index: 'log-*'
     object:
       logs:
         enabled: true
-        template: kibana/files/objects/dashboard_logs.json
+        template: kibana/files/v5/objects/dashboard_logs.json
         type: dashboard
       logs-directly:
         enabled: true