8029718: Should always use lambda body structure to disambiguate overload resolution
Reviewed-by: dlsmith, jjg, jlahoda

8016177: structural most specific and stuckness
Reviewed-by: jjg, vromero
Contributed-by: maurizio.cimadamore@oracle.com

8009131: Overload: javac should discard methods that lead to errors in lambdas with implicit parameter types
Summary: Lambdas that have errors in their bodies should make enclosing overload resolution fail
Reviewed-by: jjg

8005244: Implement overload resolution as per latest spec EDR
Summary: Add support for stuck expressions and provisional applicability
Reviewed-by: jjg

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