Merge pull request #1521 from edx/ned/quiet-mock-youtube-test-server

Mock servers shouldn't pollute test output.

common/lib/xmodule/xmodule/util/mock_youtube_server/mock_youtube_server.py

 from BaseHTTPServer import HTTPServer, BaseHTTPRequestHandler
-import urlparse
+import json
 import mock
+import sys
 import threading
-import json
+import time
+import urlparse
 from logging import getLogger
+
+
 logger = getLogger(__name__)
-import time
 
 class MockYoutubeRequestHandler(BaseHTTPRequestHandler):
     '''
@@ -14,6 +17,15 @@ class MockYoutubeRequestHandler(BaseHTTPRequestHandler):
 
     protocol = "HTTP/1.0"
 
+    def log_message(self, format, *args):
+        """Log an arbitrary message."""
+        # Code copied from BaseHTTPServer.py. Changed to write to sys.stdout
+        # so that messages won't pollute test output.
+        sys.stdout.write("%s - - [%s] %s\n" %
+                         (self.client_address[0],
+                          self.log_date_time_string(),
+                          format % args))
+
     def do_HEAD(self):
         code = 200
         if 'test_transcripts_youtube' in self.path: