[12u] RFR : 8221530: Caller sensitive methods not handling caller = null when invoked by JNI code with no java frames on stack + JDK-8222078, JDK-8222082, JDK-8222111

[Ivan Gerasimov]

Hello!

This is request to review the combined backport for the four listed bugs 
(the later three are the test fixes).

The first fix had to be slightly modified:
1) The spec change was removed from AccessibleObject.java,
2) The method jdk.test.lib.Platform.sharedLibraryPathVariableName(), 
which is used in the regression test was added (this method was 
introduced with the fix for JDK-8216265 
<https://bugs.openjdk.java.net/browse/JDK-8216265>, which is not 
feasible to backport).

Would you please review and approve?

BUGURL: https://bugs.openjdk.java.net/browse/JDK-8221530
WEBREV: http://cr.openjdk.java.net/~igerasim/8221530/00/webrev/

Thanks in advance!

-- 
With kind regards,
Ivan Gerasimov