Finish converting java3d to an spkg #1533
Description
The java3d code (with the associated, rather large) Sun jar files is now duplicated in extcode and a java3d spkg. The new code from #1473 needs to be merged into the spkg, which installs files in $SAGE_LOCAL/java and the notebook/command line should use the files from there (not extcode).
Component: graphics
Issue created by migration from https://trac.sagemath.org/ticket/1533