Properly parse url for grading controller

lms/djangoapps/courseware/tabs.py

@@ -24,6 +24,7 @@ from static_replace import replace_urls
 from open_ended_grading.peer_grading_service import PeerGradingService
 from open_ended_grading.staff_grading_service import StaffGradingService
 from open_ended_grading.controller_query_service import ControllerQueryService
+from open_ended_grading import open_ended_util
 from student.models import unique_id_for_user
 from models import StudentModule
 import datetime
@@ -158,10 +159,8 @@ def _peer_grading(tab, user, course, active_page):
 def _combined_open_ended_grading(tab, user, course, active_page):
     if user.is_authenticated:
         link = reverse('open_ended_problems', args=[course.id])
-        peer_grading_url = settings.PEER_GRADING_INTERFACE
-        split_url = peer_grading_url.split("/")
-        controller_url = "http://" + split_url[2] + "/grading_controller"
-        log.debug(controller_url)
+
+        controller_url = open_ended_util.get_controller_url()
         controller_qs = ControllerQueryService(controller_url)
         student_id = unique_id_for_user(user)
         course_id = course.id

lms/djangoapps/open_ended_grading/open_ended_util.py

+from django.conf import settings
+
+def get_controller_url():
+    peer_grading_url = settings.PEER_GRADING_INTERFACE
+    split_url = peer_grading_url.split("/")
+    controller_url = "http://" + split_url[2] + "/grading_controller"
+    return controller_url

lms/djangoapps/open_ended_grading/views.py

@@ -19,6 +19,8 @@ import json
 from .staff_grading import StaffGrading
 from student.models import unique_id_for_user
 
+import open_ended_util
+
 
 log = logging.getLogger(__name__)
 
@@ -28,7 +30,8 @@ if settings.MOCK_PEER_GRADING:
 else:
     peer_gs = PeerGradingService(settings.PEER_GRADING_INTERFACE)
 
-controller_qs = ControllerQueryService(settings.PEER_GRADING_INTERFACE)
+controller_url = open_ended_util.get_controller_url()
+controller_qs = ControllerQueryService(controller_url)
 
 """
 Reverses the URL from the name and the course id, and then adds a trailing slash if