RFR(M) : 8181335 : remove packageless CompilerUtils

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev/8181335/webrev.00/index.html
> 298 lines changed: 61 ins; 96 del; 141 mod;

Hi all,

could you please review this fix which removes packageless CompilerUtils and updates all its users to use jdk.test.lib.compiler.CompilerUtils instead?

webrev: http://cr.openjdk.java.net/~iignatyev/8181335/webrev.00/index.html
jbs: https://bugs.openjdk.java.net/browse/JDK-8181335
testing: :tier[1-3]

Thanks,
-- Igor