JDK-8180368 javapackager and Maven Toolchains

[Anthony Vanelverdinghe]

Hi

This issue [1] was given lower priority because "reproducing the bug 
requires intentionally setting JAVA_HOME to old JDK and using files from 
new one".
However, I just want to point out that this is not some artificial 
construction: Maven Toolchains [2] allow to build projects with a JDK 
which is different than the one Maven itself is running on. In my case, 
this issue was triggered by running Maven on JDK 8, while building with 
a JDK 9 toolchain.

[1] https://bugs.openjdk.java.net/browse/JDK-8180368
[2] 
http://maven.apache.org/plugins/maven-toolchains-plugin/toolchains/jdk.html

Kind regards,
Anthony