feat(#301): Add support for Tag and Tags annotation from JUnit 5

[lordofthejars]

Short description of what this resolves:

Add support for Tag and Tags annotation from JUnit 5

Changes proposed in this pull request:

• Add scanning support for @Tag and @Tags annotations
• Add support for meta annotations annotated with @Tag.

Fixes #301

[lordofthejars]

Before merging I'll update the docs.

[lordofthejars]

@dipak-pawar I am not sure that adds any benefit adding a ftest for this use case. Notice that the change is internal, the logic is the same,the only difference is that now we are taking @Categories or @Tags but then the logic is exactly the same. And this extracting logic is fully covered with unit tests.

In my opinion adding a new ftest means adding extra 15 seconds on build which are not necessary at all for this case.