Add LO_JAVA_DIR to CppunitTest env.
Add LO_JAVA_DIR to CppunitTest env.

This is needed for e.g. HSQLDB to run in a unit test.

Change-Id: I71d6de35fc20512afaebf8a76a052640a07fba6b
Reviewed-on: https://gerrit.libreoffice.org/6023
Reviewed-by: Stephan Bergmann <05c31e1673f7a15a4f0f5429fb1e32d6e84bebe3@redhat.com>
Tested-by: Stephan Bergmann <05c31e1673f7a15a4f0f5429fb1e32d6e84bebe3@redhat.com>

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core