8076543: Add @modules as needed to the langtools tests
Reviewed-by: jjg, shurailine

8005282: Use @library tag with non-relative path for javac tests
Reviewed-by: jjg

6983738: Use a JavacTestingAbstractProcessor
Reviewed-by: jjg

6519115: MirroredTypeException thrown but should be MirroredTypesException
Reviewed-by: jjg