(Re-)enable pillar users-formula:lookup

pillar.example

+users-formula:
+  lookup:  # override the defauls in map.jinja
+    root_group: root
+
 users:
   ## Minimal required pillar values
   auser:

users/map.jinja

     'sudo_package': 'sudo',
     'googleauth_package': 'libpam-google-authenticator',
   },
-}, merge=salt['pillar.get']('users:lookup')) %}
+}, merge=salt['pillar.get']('users-formula:lookup')) %}