Fix webpack_encore.entrypoint_lookup registration

[MrMitch]

The webpack_encore.entrypoint_lookup service instanciation was throwing an exception, preventing it from being used properly with dependency injection.

Closes #36

[MrMitch]

The tests pass, the failure is due to a deprecation warning that was not introduced by this PR :

The "PHPUnit_Framework_MockObject_Matcher_ConsecutiveParameters::verify()" method will
require a new "PHPUnit_Framework_MockObject_Invocation $invocation" argument in the next
major version of its parent class "PHPUnit_Framework_MockObject_Matcher_StatelessInvocation", 
not defining it is deprecated.

[weaverryan]

Hey @MrMitch!

I noticed this a few days ago too - that service is totally broken. The reason we didn't notice is that... if you look closely, it's not used inside the bundle anymore! It's even passed to webpack_encore.twig_entry_files_extension, but that service doesn't actually use it.

The proper solution is to not use this service at all anymore - and to use webpack_encore.entrypoint_lookup_collection instead and then fetch out the default entrypoint lookup.

Would you mind re-working this PR to actually completely remove the webpack_encore.entrypoint_lookup service?

[weaverryan]

Thanks for opening this @MrMitch. As I mentioned earlier, we've actually removed the broken service entirely. This was a really nice PR though - I like the integration tests you added. I hope we'll see you again here :)

[MrMitch]

Hi @weaverryan, thank you for the feedback. I've had no time to circle back to this and the solution you implemented in #45 seems more elegant and more flexible.
Any reason why it couldn't get included in the recent 1.2.0 or 1.2.1 releases ?