[RFR] (XS) 8141489: [TESTBUG] requiredVersion in TEST.ROOT needs to updated to 4.1 b12

[Chris Plummer]

Please review the following changes:

http://cr.openjdk.java.net/~cjplummer/8141489/
https://bugs.openjdk.java.net/browse/JDK-8141489

The changes I did for 8140189 require that version 4.1 b12 of jtreg be 
used, so TEST.ROOT has been updated to reflect this.

Testing with JPRT right now. I also ran with b11 and confirmed that the 
following errors are produced for hotspot and jdk tests:

     Error: The testsuite at /local/ws/jdk9/hs-rt.8141489/jdk/test 
requires jtreg version 4.1 b12 or higher and this is jtreg version 4.1 b11.

     Error: The testsuite at /local/ws/jdk9/hs-rt.8141489/hotspot/test 
requires jtreg version 4.1 b12 or higher and this is jtreg version 4.1 b11.

thanks,

Chris