Add excluded and mode attributes to Parameter

[ivan-neverov-al]

Adding excluded and mode options for Parameter class for Ruby binding

[CLAassistant]

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[andrcuns]

@ivan-neverov-al Thanks, changes look good to me, few minor questions from me.

[ivan-neverov-al]

@andrcuns missed one more rubocop fix

[andrcuns]

It's much better now, but I think it's better to have explicit constants for each mode as it is more explicit and avoids using plain strings in code, better for future maintainability

[andrcuns]

One small thing I missed. I think we should not allow to create json with invalid values, it will cause issues downstream I believe

[andrcuns]

Sorry, some of my suggestions are causing rubocop issues, I don't have an editor with code open right now

[ivan-neverov-al]

@andrcuns sorry, missed rubocop and one test

[qlty-cloud-legacy]

Code Climate has analyzed commit 404d994 and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 100.0% (80% is the threshold).

This pull request will bring the total coverage in the repository to 98.9% (0.0% change).

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