RFR: 8044029 - JNI exception pending checks in java.net

[Mark Sheppard]

Hi,
    please oblige and review the following fix
http://cr.openjdk.java.net/~msheppar/8044029/webrev/

for the issue
https://bugs.openjdk.java.net/browse/JDK-8044029

which is a backport of
https://bugs.openjdk.java.net/browse/JDK-8025293

the changeset didn't appear to apply cleanly, necessitating its 
application by hand

regards
Mark