default shell is bash, not fish

... sadly :(

bundles/users/items.py

@@ -25,7 +25,7 @@ for username, attrs in node.metadata['users'].items():
         user = users.setdefault(username, {})
 
         user['home'] = home
-        user['shell'] = attrs.get('shell', '/usr/bin/fish')
+        user['shell'] = attrs.get('shell', '/bin/bash')
         user['password'] = repo.vault.human_password_for('user {} on {}'.format(username, node.name))
 
         if 'groups' in attrs:

groups/all.py

@@ -17,9 +17,9 @@ groups['all'] = {
                     'www-data',
                     'libvirt',
                 ],
+                'shell': '/usr/bin/fish',
             },
             'sophie': {
-                'shell': '/bin/bash',
                 'ssh_pubkey': [
                     'ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDU7XmpX4w+rGQDi+dF6M0q65K2iHVgD1wHBoHREjyqCzmPGZgrnLIv6EN9WWJXjCgRdLEUXgPn7PNJnAgBs3U8G8MsF55yrPNUIsEeg6v+Y6zibEujMrwmeDSk0XAn8iSZcy+4cnqykIMk9Hd5WXW7ZhSHGs4MftWn3Z/q15qPHl/w9OyaKDJAjk8yEsD1sZoAQMhomKliKjJ5a6jNyf7otS3HdbZx4KXABJNuWn/IvmwkcaIU8ljyuPkPkiMn5JWhcUK2kE81Y4a5zJxxusSXSF6Ip7W2Rhv+4gnScTjhTPsG70HlSF/LAB2ytKo0F0N/ZB2hJk+Jq6cAwNBzuST7 sophie@ejgwmobile',
                     ],