RFR: JDK-8189099 JTReg now supports 256 jobs

Fri Nov 24 10:22:13 UTC 2017

 From the bug report:
"According to research by Jonathan Gibbons , JTReg now supports 256 
jobs, in contrast to the older limit of 50 jobs. This limit is enforced 
in the make files, and it should be updated to reflect the new limit (or 
the check removed entirely)."

I choose to remove the check. If you send in more than JOBS=256, then 
JTReg will complain. If that limit is ever increased, it should only be 
done so in JTReg, not also in the makefiles.

Bug: https://bugs.openjdk.java.net/browse/JDK-8189099
WebRev: 
http://cr.openjdk.java.net/~ihse/JDK-8189099-remove-jtreg-job-limit-of-50/webrev.01

/Magnus