8172190: Re-apply the fix for bugs 8062389, 8029459, 8061950
Summary: Final fix for 8062389: Class.getMethod() is inconsistent with Class.getMethods() results, 8029459: getMethods returns methods that are not members of the class, 8061950: Class.getMethods() exhibits quadratic time complexity
Reviewed-by: alanb, mchung, psandoz, dfuchs, darcy, redestad

8171988: Backout of fix for 8062389, 8029459, 8061950
Reviewed-by: chegar

8062389: Class.getMethod() is inconsistent with Class.getMethods() results
8029459: (reflect) getMethods returns methods that are not members of the class
8061950: Class.getMethods() exhibits quadratic time complexity
Reviewed-by: alanb, mchung, psandoz, dfuchs, darcy