Fix pyclbr test of httplib without really understanding pyclbr.
Fix pyclbr test of httplib without really understanding pyclbr.

It seems that the new class HTTP11 in httplib.test() isn't
discoverable by pyclbr, which causes this test to fail.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator