All absolute url generation should include ports

[rakelley]

The port support added in #320 currently only works when the route has a host token that differs from the provided context. In reality, if we need a port, we need it whenever an absolute URL is generated.

Note: I don't care for the repeated ternary concatenation and would change it, but @emulienfou made specific emphasis on this in the original PR comments, so I preserved it.

[tobias-93]

Thanks @rakelley

[wadjeroudi]

@tobias-93 I think this PR should be reverted because of #379.
The test is not correct, the host already includes non standard ports so in the test the host should be localhost:1234
https://github.com/FriendsOfSymfony/FOSJsRoutingBundle/blob/master/Extractor/ExposedRoutesExtractor.php#L137
So the port was already present with non standard ports, and if you need to include it for standard ports, you should tweak the getPort function.
https://github.com/FriendsOfSymfony/FOSJsRoutingBundle/blob/master/Extractor/ExposedRoutesExtractor.php#L146

[dew326]

Hi @tobias-93, I created PR for the issue with non standards ports (#381). Could you take a look?