RFR(S) : 8149729 : [jittester] Replace all 'path1 +"/" + path2' with Paths::get

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8149729/webrev.00/index.html
> 24 lines changed: 10 ins; 3 del; 11 mod;

Hi all,

could you please review this clean up patch for jit-tester library?

webrev: http://cr.openjdk.java.net/~iignatyev//8149729/webrev.00/index.html
JBS: https://bugs.openjdk.java.net/browse/JDK-8149729

Thanks,
-- Igor