Include step comments in report

[jfougere]

This PR fixes #828 by parsing comments from JSON file and displaying above steps.

For Karate users, another ticket is opened to include comments in those JSON file, see karatelabs/karate#1677

[damianszczepanik]

Add sample comments into sample.json so then it is visible at http://damianszczepanik.github.io/cucumber-html-reports/overview-features.html
Add integration tests that examines new field. I believe you can take as a reference many of them as they are delivered

[codecov-commenter]

Codecov Report

Merging #1012 (784acc1) into master (edc75f9) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@            Coverage Diff            @@
##             master    #1012   +/-   ##
=========================================
  Coverage     97.16%   97.17%           
- Complexity      546      547    +1     
=========================================
  Files            54       54           
  Lines          1200     1202    +2     
  Branches        103      103           
=========================================
+ Hits           1166     1168    +2     
  Misses           20       20           
  Partials         14       14           

Impacted Files	Coverage Δ
...ain/java/net/masterthought/cucumber/json/Step.java	94.59% <100.00%> (+0.30%)	⬆️

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[jfougere]

@damianszczepanik done. Please review

[jfougere]

Hi @damianszczepanik could you have another look to this PR ? thanks

[jfougere]

Hi @damianszczepanik could you have another look to this PR ? thanks

[jfougere]

Hi @damianszczepanik could you review again ? For me all remarks have been taken into account.
Thanks

[damianszczepanik]

Good job!

[jfougere]

@damianszczepanik I see you did the release in 5.6.0. That's great thanks.

Could you also do a new release of https://github.com/jenkinsci/cucumber-reports-plugin with 5.6.0 version of the library ?
Thanks