fix(kubernetes_role): get prime hostname

required to set https address

!75

roles/nfc_kubernetes/templates/k3s-config.yaml.j2

@@ -201,8 +201,18 @@
     not node_k3s.installed
   -%}
 
+    {% set ns = namespace(prime_name) %}
+
+    {% for hostname, values in hostvars.iteritems() %}
+      
+      {%- if values.nfc_role_kubernetes_node_prime] ==true -%}
+        {% set ns.prime_name = hostname %}
+      {%- endif -%}
+
+    {% endfor %}
+    
     {%- set server = (server | default([])) + [
-      "https://" + hostvars[nfc_role_kubernetes_node_prime].ansible_host + ":6443"
+      "https://" + hostvars[ns.prime_name].ansible_host + ":6443"
     ] -%}
 
     {%- set all_nodes_config = all_nodes_config | combine({