Do not create server cert files

Server certificates are managed by salt.minion.certs formula

Related bug: https://mirantis.jira.com/browse/PROD-24174

Change-Id: Ibc2aa910c8eb0f7b537e6d897262db20df08dd85
diff --git a/kubernetes/master/controller.sls b/kubernetes/master/controller.sls
index 83f752d..1773405 100644
--- a/kubernetes/master/controller.sls
+++ b/kubernetes/master/controller.sls
@@ -250,7 +250,7 @@
 
 /etc/kubernetes/ssl/{{ filename }}:
   file.managed:
-    - source: salt://{{ master.get('cert_source','_certs/kubernetes') }}/{{ filename }}
+    - create: False
     - user: root
     {%- if pillar.get('haproxy', {}).get('proxy', {}).get('enabled') %}
     - group: haproxy