RFR(S): 8201331: Better test cleanup for jdk/jfr/api/consumer/TestRecordingFile.java

[Tim Bell]

Erik:
> Could I please have a review of this test fix for JFR.
>
> Recording files were left behind in the /tmp directory on test machines.
> Solution is to write files to "user.dir". As part of this fix, the names
> of the test files were improved as well.
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8201331
>
> Webrev:
> http://cr.openjdk.java.net/~egahlin/8201331.1/
>
> Testing:
> Tests in test/jdk/jdk/jfr

Thank you for fixing all these tests.  Looks good.

Tim