This is not the admin group per-se but the group where users can create/delete containers. This is will be fixed properly when the swift-keystone2 middleware would be commited in keystone (should be sometime soon).
@@ -16,6 +16,7 @@ account_autocreate = true
use = egg:swiftkeystone2#keystone2
keystone_admin_token = %SERVICE_TOKEN%
keystone_url = http://localhost:35357/v2.0
+keystone_admin_group = Member
[filter:tempauth]
use = egg:swift#tempauth