fix subnet var name when config passwordless

Author: bgraef

olam/configure_passwordless_ssh.yml

@@ -62,7 +62,7 @@
         ssh-keyscan -t ecdsa-sha2-nistp256 \
         {{ hostvars[item].ansible_hostname }},\
         {{ hostvars[item].ansible_default_ipv4.address }},\
-        {{ hostvars[item].ansible_hostname + '.' + my_subnet1_domain_name }} >> ~/.ssh/known_hosts
+        {{ hostvars[item].ansible_hostname + '.' + my_subnet_domain_name }} >> ~/.ssh/known_hosts
       with_items:
         # - "{{ groups['all'] }}"
         "{{ ansible_play_hosts_all | difference(['localhost']) }}"