FULL PRODUCT VERSION :
java version "1.8.0_92"
Java(TM) SE Runtime Environment (build 1.8.0_92-b14)
Java HotSpot(TM) 64-Bit Server VM (build 25.92-b14, mixed mode)

ADDITIONAL OS VERSION INFORMATION :
Mac Ox X 10.11.5 - El Capitan

A DESCRIPTION OF THE PROBLEM :
Using javapackager as follows:

javapackager -deploy -v -native dmg -outdir OUT_DIR -outfile MyApp.app -srcfiles myapp.jar -appclass myapp.Main -name MyApp

This produces working app in the dmg, but the app contains the whole JDK, instead of JRE, making the DMG 100Mb biiger than it should be.

If I dowload separate jre, and use -Bruntime=jre_to_bundle/, the result is as expected.
The same command in windows, with -native msi , produces the expected result : app that has only JRE.

The same applies for fx:deploy except that there is no way to specify -Bruntime parameter.
After some digging around the fxdeploy task sources, I found that I can pass basedir="jre_to_bundle/" to fx:platform, but this fails with the following error :

Can not find JDK artifacts in specified location: /Users/myuser/dev/myapp/jre_to_bundle/Contents/Home


EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
dmg/ macos app that has JRE bundled
ACTUAL -
dmg/ macos app has JDK bundled instead

REPRODUCIBILITY :
This bug can be reproduced always.