RFR: 8019826 Test com/sun/management/HotSpotDiagnosticMXBean/SetVMOption.java fails with NPE

[Jaroslav Bachorik]

Please, review this simple fix.

http://cr.openjdk.java.net/~jbachorik/8019826/webrev.00

Firstly, the patch removes a conditional early exit which checks for a
build 52 of an unspecified major JVM version - it is not needed any
more. Basically, the condition just made the test a noop till the latest
hotspot version.

The second fix is correctly setting the "mbean" attribute - it was not
properly initialized and because of this the test was going to fail with
NPE.

Thanks,

-JB-