Translate strings in xmodule/capa_*.py

LMS-1744

common/lib/xmodule/xmodule/capa_module.py

@@ -62,12 +62,14 @@ class CapaModule(CapaMixin, XModule):
             'ungraded_response': self.handle_ungraded_response
         }
 
-        generic_error_message = (
+        _ = self.runtime.service(self, "i18n").ugettext
+
+        generic_error_message = _(
             "We're sorry, there was an error with processing your request. "
             "Please try reloading your page and trying again."
         )
 
-        not_found_error_message = (
+        not_found_error_message = _(
             "The state of this problem has changed since you loaded this page. "
             "Please refresh your page."
         )

lms/djangoapps/instructor_task/tests/test_integration.py

@@ -265,10 +265,10 @@ class TestRescoringTask(TestIntegrationTask):
         self.assertEqual(instructor_task.task_state, FAILURE)
         status = json.loads(instructor_task.task_output)
         self.assertEqual(status['exception'], 'NotImplementedError')
-        self.assertEqual(status['message'], "Problem's definition does not support rescoring")
+        self.assertEqual(status['message'], "Problem's definition does not support rescoring.")
 
         status = InstructorTaskModuleTestCase.get_task_status(instructor_task.task_id)
-        self.assertEqual(status['message'], "Problem's definition does not support rescoring")
+        self.assertEqual(status['message'], "Problem's definition does not support rescoring.")
 
     def define_randomized_custom_response_problem(self, problem_url_name, redefine=False):
         """