BUG: Director::test() don't respect port settings in $_FILE_TO_URL_MAPPING

Director::test() don't set the HTTP_HOST with the port number if that has been set.
Later call to Director::makeRelative() will return wrong value because of the strict string matching
(http://localhost/ != http://localhost:8000)

This bug affects all modules that are using Director::test in CLI where the $_FILE_TO_URL_MAPPING
have been set to use a domain with a port in it, i.e. static publishers.
Merge pull request #2852 from stojg/director-test-http-port

BUG: Director::test() don't respect port settings in $_FILE_TO_URL_MAPPING