RFR (XSS): 8027752: sun/tools/jstatd/TestJstatdExternalRegistry.java: java.lang.SecurityException: attempt to add a Permission to a readonly Permissions object

[Yekaterina Kantserova]

Hi,

Could I please have a review of this fix.

Bug:
https://bugs.openjdk.java.net/browse/JDK-8027752

Webrev:
cr.openjdk.java.net/~ykantser/8027752/webrev.00

Thanks,
Katja