8024154: Fix for 8016177: structural most specific and stuckness breaks 6 langtools tests
Reviewed-by: jjg, jfranck

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

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