added root user to vars

vars.yml

@@ -1,6 +1,9 @@
 # User which will be created on the LXC containers to replace root
 target_user: 'mbuz'
 
+# User which Ansible will use to connect to the LXC containers initially
+ansible_user: 'root'
+
 # List of public keys to be added to the target_user's authorized_keys file
 my_public_keys:
   - "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINSGj0dxaA38QSBVY3DZiPb+qmIuTFxGo0mt4sbmYDa3 mbuz@macbook-pro"