add trolleybus & monorail support

[vesavlad]

PR Instructions

When creating a pull request, please follow the format below. For each section, replace the guidance text with your own text, keeping the section heading. If you have nothing to say in a particular section, you can completely delete the section including its heading to indicate that you have taken the requested steps. None of these instructions or the guidance text (non-heading text) should be present in the submitted PR. These sections serve as a checklist: when you have replaced or deleted all of them, the PR is considered complete. As of 2021, most regular OTP contributors participate in our twice-weekly conference calls. For all but the simplest and smallest PRs, participation in these discussions is necessary to facilitate the review and merge process. Other developers can ask questions and provide immediate feedback on technical design and code style, and resolve any concerns about long term maintenance and comprehension of new code.

Summary

Add support for correctly parsing gtfs feeds with route of type trolleybus or monorail

Issue

closes #3657

Unit tests

Write a few words on how the new code is tested.

• Were unit tests added/updated?
• Was any manual verification done?
• []Any observations on changes to performance?
• Was the code designed so it is unit testable?
• Were any tests applied to the smallest appropriate unit?
• Do all tests pass the continuous integration service?

Code style

Have you followed the suggested code style?

Documentation

• [] Have you added documentation in code covering design and rationale behind the code?
• Were all non-trivial public classes and methods documented with Javadoc?
• [] Were any new configuration options added? If so were the tables in the configuration documentation updated?

Changelog

• Was a bullet point added to the changelog file with description and link to the linked issue?

[leonardehrenfried]

Presumably you want to include/exclude these modes in your routing requests. Am I seeing this correctly?

[leonardehrenfried]

If you don't, then mapping to bus and rail respectively would already be enough to get OTP to use them.

[vesavlad]

Indeed want to give user flexibility to query and filter as he desires.
Maybe I need to also need to change the graphql ext part. Just let me know.

[leonardehrenfried]

There are a couple of proposals floating around the community to make the modes more flexible and add more precise sub-modes (which I think monorail and trolleybus are) therefore I'm not sure that the community will accept this PR. (Note: I'm not the final arbiter of these things.)

Perhaps it's best if you join the OTP developer meeting that is happening Tuedays at 10am CEST and Thursdays at 3pm CEST on Google Hangout: https://meet.google.com/qwh-xzbz-atr

[t2gran]

If you don't, then mapping to bus and rail respectively would already be enough to get OTP to use them.

Mapping these two modes as @leonardehrenfried suggest above would make this PR simple to approve, then we can discuss introducing new modes as a separate thing and decide on that in the issue #3657. I am not saying we will not accept it, I am just saying it need more discussion.

FYI: We (Entur) are likely to propose a configurable submodes as a Sandbox in the near future.

[abyrd]

This looks good to me, especially considering that these modes were added to the official base GTFS spec, and this PR also maps these new modes from the TPEG extension modes.

[abyrd]

Now that we have so many of these it might be better to define them by bit-shifting 1 by successive integers, to avoid any errors in writing out the powers of 2 as integer literals.