unit test for catching WWM-70.
clean up FastArchivalUrlReplayParseEventHandlerTest.
add a test case for url function in @font-face.
change expected context suffix to "im_" for url() in @font-face.
it works for now and does not require elaborate pattern matching.
fixes WWM-70 (contributed by Ilya)
Merge pull request #4 from kngenie/WWM-70

unit test and fix for WWM-70