Change all beans.xml to make bean archives implicit.

[manovotn]

Fixes #235

[manovotn]

Ah, tests seem to rely on that discovery mode, will fix that in a bit.

[manovotn]

I have figured one of the test failures, but I can't understand why the FullStackTest crashes with changed discovery mode. It just gives me 404 but it has to have something to do with bean discovery.
ATM I have reverted the PR to just keep discovery mode all within tests (which is harmless anyway) and I will look into the above described problem tomorrow.

[manovotn]

Ok, turns out this is the way it should be. Bean discovery mode all is required in tests because of ResteasyCdiExtension. Without it, Weld won't fire ProcessAnnotatedType for rest resources (because they don't have bean defining annotations) and resteasy won't know about them, hence 404. Subsequently, we won't fire ProcessInjectionTarget which they extension is trying to wrap in order to perform their injection, so even if you specify the resource manually, this part will fail because of no injection into the resource.
Long story short, they extension is somewhat weird and relies in CDI mode all to actually work its magic. Having this mode in just tests is OK, so we can just keep it that way.

@FroMage please re-stamp the PR whenever you have some spare minute.