Execute namespace creation/removal only if namespaces defined

Change-Id: Ie0f1911a97e96fc11b4dcd3aef897104888cefaa
Related-PROD: PROD-28278 (PROD:28278)
diff --git a/kubernetes/master/controller.sls b/kubernetes/master/controller.sls
index 231f648..0bfe698 100644
--- a/kubernetes/master/controller.sls
+++ b/kubernetes/master/controller.sls
@@ -334,6 +334,7 @@
 
 {%- endif %}
 
+{%- if master.namespace is defined %}
 
 {%- for name,namespace in master.namespace.items() %}
 
@@ -368,6 +369,8 @@
 
 {%- endfor %}
 
+{%- endif %}
+
 {%- if master.registry.secret is defined %}
 
 {%- for name,registry in master.registry.secret.items() %}