Only redirect when redirect url is an internal page.

common/djangoapps/terrain/course_helpers.py

@@ -65,7 +65,7 @@ def log_in(username, password):
 
 @world.absorb
 def register_by_course_id(course_id, is_staff=False):
-    create_user('robot')
+    create_user('robot', 'password')
     u = User.objects.get(username='robot')
     if is_staff:
         u.is_staff = True

common/djangoapps/terrain/steps.py

@@ -168,6 +168,11 @@ def dialogs_are_closed(step):
     assert world.dialogs_closed()
 
 
+@step(u'visit the url "([^"]*)"')
+def visit_url(step, url):
+    world.browser.visit(django_url(url))
+
+
 @step('I will confirm all alerts')
 def i_confirm_all_alerts(step):
     """