test_per_queue_staff_permissions uses an int as a password

[ghost]

In test_per_queue_staff_permissions.py ...
Line 13 : IDENTIFIERS = (1, 2)
Line 34 : for identifier in self.IDENTIFIERS:
Line 44 : user.set_password(identifier)

Line 44 sets the test user's password to the int 1 (or 2). This is fine for the django auth backend, however the ldap backend of Peter Sagerson's excellent django-auth-ldap (https://pythonhosted.org/django-auth-ldap/) throws an error when trying to len(password):
TypeError: object of type 'int' has no len()

A password should always be a string, so maybe we should to this:
Line 44 : user.set_password(str(identifier))