Fixed import issue with WebDriverException

common/djangoapps/terrain/course_helpers.py

@@ -9,7 +9,6 @@ from django.contrib.sessions.middleware import SessionMiddleware
 from student.models import CourseEnrollment
 from bs4 import BeautifulSoup
 import os.path
-from selenium.common.exceptions import WebDriverException
 from urllib import quote_plus
 from lettuce.django import django_url
 

common/djangoapps/terrain/ui_helpers.py

 from lettuce import world, step
 import time
 from urllib import quote_plus
+from selenium.common.exceptions import WebDriverException
 
 @world.absorb
 def wait(seconds):