<Swing Dev> RFR(M) : 8210039 : move OSInfo to top level testlibrary

[Igor Ignatyev]

http://cr.openjdk.java.net/~iignatyev//8210039/webrev.00/index.html
> 698 lines changed: 114 ins; 240 del; 344 mod

Hi all,

could you please review this clean up of jdk testlibrary?
the patch updates the tests to use jdk.test.lib.Platform instead of jdk.testlibrary.OSInfo.OSType, cleans up OSInfo and renames it to jdk.test.lib.OSVersion.

testing: changed tests + :jdk_desktop test group
webrev: http://cr.openjdk.java.net/~iignatyev//8210039/webrev.00/index.html
JBS: https://bugs.openjdk.java.net/browse/JDK-8210039

Thanks,
-- Igor