RFR(XS) : 8186548 : move jdk.testlibrary.JcmdBase closer to tests

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8186548/webrev.00/index.html
> 10 lines changed: 4 ins; 4 del; 2 mod;

Hi all,

could you please review this small patch which puts JcmdBase into the directory w/ the only two tests which use it?

JBS: https://bugs.openjdk.java.net/browse/JDK-8186548
webrev: http://cr.openjdk.java.net/~iignatyev//8186548/webrev.00/index.html
testing: sun/tools/jcmd tests + jdk-tier[1-3] 

Thanks,
-- Igor