Plugin refactoring

[bradleylarrick]

This branch contains a refactoring of the japicmp-maven-plugin. The main POM has been changed to use:

maven-api = 3.8.1
resolver.version = 1.6.2

to facilitate proper unit tests for the plugin. The core plugin logic has been moved to:

JApiCmpProcessor.java

and the japicmp-maven-plugin POM file has been enhanced to generate site reports for JaCoCo, Javadoc, etc.

The new unit tests increase code coverage to about 62%. I'll work on more tests to increase code coverage.

[siom79]

Thanks for submitting the pull request. Next week I am quite involved in other topics; hence I won't have enough time to review it properly. But after that week, I have put it on my todo list.

[siom79]

Have you seen, the test are failing with org.eclipse.aether.transfer.NoRepositoryConnectorException: No connector factories available

[bradleylarrick]

I saw that. It's just a warning in my environment. I'll look into it.

[bradleylarrick]

I think I solved the build problem. Do I need to do another pull request?

[siom79]

Now all builds are green. Thanks for the updates.
As I said before, I won't have enough time before next week.