Updated to reflect the last changes to the code.
The env var CHPL_LAUNCHER_USE_SBATCH is used again to send jobs to the
queue system using sbatch



git-svn-id: http://svn.code.sf.net/p/chapel/code/branches/collaborations@21790 3a8e244f-b0f2-452b-bcba-4c88e055c3ca