[cucumber-jvm] Add attachments to allure reports using cucumber api

[PavloNikolenko]

Context

This PR allows users of cucumber + allure to add attachments using cucumber api:
scenario.write("Text comment")
scenario.embed(byte[], "image/png")

Cucumber documentation: https://docs.cucumber.io/cucumber/api/#after

Checklist

• Sign Allure CLA
• Provide unit tests

[CLAassistant]

All committers have signed the CLA.

[baev]

👍

Could you please add a tests?

[PavloNikolenko]

Sure. I'll work on it.

[PavloNikolenko]

Ignore that last commit. Just fixing github user issue.

[PavloNikolenko]

@baev Please review and I will add another unit test for scenario.embed

[baev]

LGTM in general. Please add tests for both methods to all adaptor versions

[PavloNikolenko]

@baev Please review when you get a chance

[baev]

@PavloNikolenko could you please resolve conflicts

[PavloNikolenko]

Resolved

[baev]

[Sizes | LineLength] io.qameta.allure.cucumberjvm.(AllureCucumberJvm.java:263)
Line is longer than 120 characters (found 133).
http://checkstyle.sourceforge.net/config_sizes.html#LineLength

[PavloNikolenko]

Do you want me to update that?

[baev]

@PavloNikolenko yep, the build should pass before I can merge it

[PavloNikolenko]

Can you rebuild that job manually? Looks like something went wrong.

[PavloNikolenko]

Why is it failing?

[PavloNikolenko]

I found the problem:
this before step

@Before
public void setup(Scenario scenario)
{
    this.scenario = scenario;
}

is executed for all scenarios and messes up some other unit tests

[PavloNikolenko]

Hey @baev. Its all green now. Please take a look when you get a chance.

[baev]

@PavloNikolenko thanks! 👍

[PavloNikolenko]

Thank you =)