8031359: Invocable.getInterface() works incorrectly if interface has default methods
Reviewed-by: attila, hannesw
Error
at <anonymous> (test/script/basic/JDK-8030809.js:33)
at func (test/script/basic/JDK-8030809.js:32)
at <program> (test/script/basic/JDK-8030809.js:38)