text: Title: Error with search trying tutorial
  Body: I got an error while trying tutorial - after populating the database using fixtures any manage.py execution throws:
  TypeError: 'RegexURLPattern' object is not iterable
  
  This is somehow connected to search module - after deleting "search" page from cms all works.
  Tried on ubuntu, both 16.10 and clean 16.04, docker image works right too. 
  