7006109: Add test library to simplify the task of writing automated type-system tests
Summary: Types.java needs to be more stress-tested
Reviewed-by: jjg
1 T6230128.java:11:10: compiler.err.override.weaker.access: (compiler.misc.cant.override: foo(java.lang.Object...), A1a, foo(java.lang.Object[]), A1), public