RFR [jdk11]: 8235908: omit ThreadPriorityPolicy warning when value is set from image

Mon May 18 07:23:15 UTC 2020

Hello, please review the backport of  8235908: omit ThreadPriorityPolicy warning when value is set from image  .

The backport has small differences in jdk11 when compared to jdk/jdk .   It does not contain the coding changed by the jdk/jdk patch in os_aix.cpp
 so that file is not  touched in jdk11;  globals_extension.hpp  uses  FLAG_MEMBER  in jdk11 instead of   FLAG_MEMBER_ENUM  .

Thanks, Matthias

Bug/webrev :

https://bugs.openjdk.java.net/browse/JDK-8235908

http://cr.openjdk.java.net/~mbaesken/webrevs/8235908_jdk11_0/

webrev jdk/jdk :

https://hg.openjdk.java.net/jdk/jdk/rev/c1fdb04213e9