RFR: 8224217: RecordingInfo should use textual representation of path

[Erik Gahlin]

Hi,

Could I please have a review this fix to RecordingInfo.

Webrev:
http://cr.openjdk.java.net/~egahlin/8224217/

Bug:
https://bugs.openjdk.java.net/browse/JDK-8224217

Testing:
test/jdk/jdk/jfr/*

Thanks
Erik