8068995: Cleanup method reference lookup code
Summary: Simplify method reference code lookup and generate better/more uniform diagnostics
Reviewed-by: vromero

8020843: javac crashes on accessibility check with method reference with typevar receiver
Summary: method reference overload check doesn't walk through type-variable receivers
Reviewed-by: jjg

8008537: Missing method reference lookup error when unbound search finds a static method
Summary: Static-ness check should be applied after member reference resolution
Reviewed-by: jjg

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