RFR(M): 8066166: JEP-JDK-8046155: Test task: dcmd tests

[Pavel Punegov]

Please review the following tests for diagnostic commands in 
CompilerControl.

This change extend the previous tests for CC with ability to add, remove 
or clear directives with diagnostic command.
Each test generates one or several commands and directive file, then 
executes another VM, which will be used as a target VM for JCMD.
After the test performed all diagnostic commands, the test VM will check 
that all methods are compiled or not in the same way it was done before.

webrev: http://cr.openjdk.java.net/~ppunegov/8066166/webrev.00/
bug: https://bugs.openjdk.java.net/browse/JDK-8066166

-- 
Thanks,
Pavel Punegov