bundles/users: regular users don't need a password

bundles/users/items.py

@@ -26,7 +26,7 @@ for username, attrs in node.metadata['users'].items():
 
         user['home'] = home
         user['shell'] = attrs.get('shell', '/bin/bash')
-        user['password'] = repo.vault.human_password_for('user {} on {}'.format(username, node.name))
+        user['password_hash'] = 'x'
 
         if 'groups' in attrs:
             user['groups'] = attrs['groups']