Creating beeswax install example may ignore error creating sample user

  ...
  def handle_noargs(self, **options):
    exception = None

    # Documents will belong to this user but we run the install as the current user
    try:
      sample_user = install_sample_user()
      self._install_tables(options['user'], options['app_name'])
    except Exception, ex:
      exception = ex

    try:
      self._install_queries(sample_user, options['app_name'])
    except Exception, ex:
      exception = ex

    Document.objects.sync()

    if exception is not None:
      raise exception
    ...