When we print the ID of a benchmark, now the method we used to
generate it is also printed. We updated the tests accordingly.

I need that in order to have parameterized testing

Required some refactoring (removed arguments of one method) and to
update the tests because the distribution of methods to pick from
changed.

One function iterated two times over a stream, causing an error.

Streams are better for performance reasons apparently. They are also
more idiomatic than sequences

This project will contain the main JBrainy libraries

Avoids taking too much memory.

They can be printed as the run* format used internally, or the
java standard format for printing method names.

The printers did not print benchmark IDs before.

This was already taken into account, as Map.get was already triggered,
but it was wrongly printed as get(int), which only exists for lists.

Should not be a problem, but will probably require some changes in the
training data before training again.

Switched to a format closer to the standard output of Method.toString().
Updated tests accordingly.

Corrected two bugs relative to the printing.