Support MetaData at Test Suites

[ASaiAnudeep]

With https://github.com/test-results-reporter/parser/pull/35, we are supporting metadata at test case level. Similarly we need to support meta data at test suite level.

• [x] Cucumber implementation
• [x] jUnit implementation
• [x] Mocha implementation
• [ ] TestNG implementation
• [ ] xUnit implementation
• [x] nUnit implementation
• [ ] General KeyValue pairs from Test Name

[bryanbcook]

To update the above checklist:

• xUnit doesn't have <traits> at the <collection> level. so no implementation is required
• nUnit implemenation introduced in #38 already supports inheriting <categories> (v2) and <properties> (v3) from the parent.

[bryanbcook]

@ASaiAnudeep what else are you looking for in this issue?

TestNG captures 'groups' per test case, not per suite. I'm not sure what other meta data at the suite level you'd want to capture.

Can you provide some more detail for "General KeyValue pairs from TestName"?