8215534: [testbug] some jfr test don't check @requires vm.hasJFR

[Erik Gahlin]

Looks good.

Erik

> Hi,
>
> These tests lack @requires vm.hasJFR, thus they are failing on AIX.
> http://cr.openjdk.java.net/~goetz/wr18/8215334-JFR_requires/01/
>
> Please review.
> I will push this to jdk12 as it is a testbug if I miss  the RDP deadline.
>
> Best regards,
>    Goetz.
>