Only for thatmodule.

- renamed ParamsProviderUtil for junit5 (as it provides params for
  parameterized test).
- test the provided data.
- document better the required setup.
- data-provider dep is optional. (more of a hint).

- Allow null results from getDelay.
- Better min/max handling of delays.
- No deadlock from adding listener while handling a tick (from the
  listening callback).
- Added forInstant creator.
- Added getListeners().
- Internal naming updates.

It relies on a non-jigsaw modile, which is not compatible...

- Both for junit4 (using dataproviders).
- And for junit5, using params/Arguments.

Should not be easy to happen, but on race-condition on tick it can
happen.

Using delays from the listeners.

The tickMax should effectively do that.

And better test coverage.

- fix Junit5 test coverage.

Just uses fake clock to trigger timed schedules.

And ConsoleManager updates.

Add junit4 and junit5 module with console testing.