Kraken: Add a mocked kraken

There are simple journeys in this one, some of them have long
waiting duration
Jormungandr: Simplify get_journey
Jormungandr: Add a max_nonpt_duration filter
Jormungandr: Add test for the max_non_pt_duration
Kraken: Test if pointers are filled up

It was buggy in some UT
Jormunandr: add comment on choose best
Jormungandr: Typo fixes in comment
Jormungandr: Change the way typed journeys are counted
Jormungandr: Change tagged journeys to typed journeys
Jormungandr: Update comment on choose best
Jormungandr: Remove the build of the list
Merge pull request #335 from l-vincent-l/max_waiting_duration

Max waiting duration