conf file for lucene.jobs.sh (not used yet)

This patch let us tweak the Java settings passed to lucene.jobs.sh java
calls.  That craft a configuration file that can later be sourced in
lucene.jobs.sh to override java options.

Change-Id: I35a5a9ece25bbc890562d7c164bb595728493410
Merge "conf file for lucene.jobs.sh (not used yet)" into production