RFR 8158467: AccessControlException is thrown on public Java class access if "script app loader" is set to null

[Sundararajan Athijegannathan]

Please review http://cr.openjdk.java.net/~sundar/8158467/webrev.00/ for
https://bugs.openjdk.java.net/browse/JDK-8158467

Thanks,

-Sundar