RFR: JDK-8203891: Upgrade JOpt Simple to 5.0.4

[Jan Lahoda]

Hi,

I'd like to upgrade the JOpt Simple library we are using to version 5.0.4.

Bug: https://bugs.openjdk.java.net/browse/JDK-8203891
Complete webrev: 
http://cr.openjdk.java.net/~jlahoda/8203891/webrev.00/complete/

Delta webrev only showing (all) JDK changes in JOpt Simple and related 
changes in tests needed for the upgrade, etc.:
http://cr.openjdk.java.net/~jlahoda/8203891/webrev.00/joptsimple.delta/

Probably the biggest issue with this upgrade is that for two subsequent 
parameters:
"--libs=", "/tmp"
"/tmp" used to be interpreted as the parameter of "libs", but now the 
"libs" parameter is empty (as there's nothing behind the '='). See the 
changes to test/jdk/tools/jmod/JmodTest.java for an example. Hopefully, 
this is a reasonable change.

How does this look?

Thanks,
     Jan