Pipe analytics client output to stdout instead of devnull.

lms/djangoapps/shoppingcart/tests/test_models.py

@@ -3,7 +3,7 @@ Tests for the Shopping Cart Models
 """
 from decimal import Decimal
 import datetime
-import os
+import sys
 
 import smtplib
 from boto.exception import BotoServerError  # this is a super-class of SESError and catches connection errors
@@ -235,8 +235,7 @@ class OrderTest(ModuleStoreTestCase):
         # course enrollment object should be created but still inactive
         self.assertFalse(CourseEnrollment.is_enrolled(self.user, self.course_key))
         # the analytics client pipes output to stderr when using the default client
-        devnull = open(os.devnull, 'w')
-        with patch('sys.stderr', devnull):
+        with patch('sys.stderr', sys.stdout.write):
             cart.purchase()
         self.assertTrue(CourseEnrollment.is_enrolled(self.user, self.course_key))