Added multi_db=True to test cases that access the 'other' db connection.

Fixed a failure in the context processors tests when running in
reverse on MySQL due to an extra query after refs #27683.

tests/context_processors/tests.py

@@ -64,6 +64,7 @@ class DebugContextProcessorTests(TestCase):
     """
     Tests for the ``django.template.context_processors.debug`` processor.
     """
+    multi_db = True
 
     def test_debug(self):
         url = '/debug/'