RFR: 8219904: ClassCastException when calling FlightRecorderMXBean#getRecordings()

[Chihiro Ito]

Hi

I fixed a problem with ClassCastException. Also, I fixed the CompositeData
field name because it was incorrect.

Could you please review it?

JBS https://bugs.openjdk.java.net/browse/JDK-8219904
Webrev http://cr.openjdk.java.net/~cito/JDK-8219904/webrev.00/

The comment on the JBS mentions UneclaredThrowableException, which is a
different issue.

Regards,
Chihiro