8153884: Expression lambda erroneously compatible with void-returning descriptor
Summary: Fix lambda compatibility check for void returning expressions
Reviewed-by: vromero

8005299: Add FunctionalInterface checking to javac
Summary: Javac should check that types annotated with @FunctionalInterface are indeed functional interfaces
Reviewed-by: jjg

8003280: Add lambda tests
Summary: Turn on lambda expression, method reference and default method support
Reviewed-by: jjg