Add check for azure_route_table_name and add it to all.yml

inventory/group_vars/all.yml

@@ -150,6 +150,7 @@ dns_server: "{{ kube_service_addresses|ipaddr('net')|ipaddr(2)|ipaddr('address')
 #azure_subnet_name:
 #azure_security_group_name:
 #azure_vnet_name:
+#azure_route_table_name:
 
 
 ## Set these proxy values in order to update docker daemon to use proxies