RFR: When same path is set Preventing create new directory as repository in JFR.configure

[Chihiro Ito]

Hi all,

Could I have a reviews for this fix of "jcmd JFR.configure", please ?
This patch passed all tests in test-tier1.

http://cr.openjdk.java.net/~cito/webrev.00/

In current implementation even if user specify the same repository base 
path in jcmd JFR.configure, hotspot create a new directory (base path + 
timestamp) as repository.

This patch is hotspot don't create new directory and hotspot keep to use 
current one.

Regards,
Chihiro