sb118: backed out passing UNO_JAVA_JFW_ENV_JREHOME/CLASSPATH again; for one, those settings (partially pointing into solver) do not work to unopkg add an .oxt containing a .jar into the installation being created; for another, a fix for i77196 will probably obsolete a need to call unopkg during installation anyway; I assume I added this so that bogus ~/.ure settings do not prevent unopkg (and javaldx) from working here