Hosts are now under the [sovereign] group

Allows hosts to use vars in `group_vars/sovereign`

hosts

-[TODO]
-TODO # put your host's IP here
+[sovereign]
+# hosts in the `sovereign` group  use vars defined in `group_vars/sovereign`
+# put your host's IP address or domain name below
+host.example.net

site.yml

 # This is the top-level playbook that defines our entire infrastructure.
 
 - hosts: all
-  user: deploy
   become: True
   gather_facts: True
   vars_files: