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

6985115: tests create too much output
Reviewed-by: mcimadamore

6943119: Rebrand source copyright notices
Reviewed-by: darcy

6926699: Annotation processing regression tests should typically return SourceVersion.latest
Reviewed-by: jjg

6855236: Compiler Tree API TreePath class generates NullPointerException from Iterator
Reviewed-by: darcy