testPaths is not relative to basePath, unlike outputFile

[jimmux]

This is one possible way to add test file paths relative to basePath, to make it consistent and not break backwards compatibility of testPaths and testFilePattern. Note that I'm not a fan of my new config item name (basePathGlob) but having trouble thinking of a better one. "testFilesGlobFromBasePath" is a bit cumbersome. Naming is hard.

The gist is that config item sonarQubeUnitReporter.basePathGlob is a globbed file path, relative to basePath, that will override testPaths and testFilePattern. The path attribute that ends up in the outputFile xml is also relative to basePath.

Cheers!