Make sure this is working even if run on limited inventory

tasks/tunnel_keys.yml

@@ -11,4 +11,4 @@
     key="{{ hostvars[item].pubkey.stdout }} {{ item }}"
     path='/home/{{ tunnel_user_name }}/.ssh/fresh_auth_keys_tunnel_{{ item }}'
   with_items: '{{ groups.all }}'
-  when: item != "localhost" and inventory_hostname != "localhost"
+  when: item != "localhost" and inventory_hostname != "localhost" and hostvars[item].pubkey is defined