Added RMG_DB_FILE environment variable to lava.sh batch script
Renamed lava.sh > lsf.sh because it's for the LSF queuing system.

This is the system used on Venture at Northeastern University.
Apparently Lava is related, so it may work for both.
http://en.wikipedia.org/wiki/Platform_LSF
Fix up minor bug in lsf.sh file. Submit with "bsub < lsf.sh".