Merge back test_http_implementations.pc into test_http.py.
* bzrlib/tests/test_http.py:
Merge test_http_implementations.py now that we have rewritten
load_tests. That should reduce the noise in the final proposed
patch.
* bzrlib/tests/http_server.py:
(TestingHTTPRequestHandler.log_message): Ghaaa, don't over spell-check.