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

8062676: Tests which leak lots of file managers should be fixed (group 2)
Reviewed-by: darcy

6981185: com.sun.tools.model.JavacTypes.contains() calls Type.contains instead of Types.containsType
Summary: wrong implementation is causing trivial containment tests to fail unexpectedly (when such tests are executed using compiler API)
Reviewed-by: jjg