Scaling test should only launch one proc/node

Signed-off-by: Ralph Castain <rhc@open-mpi.org>

contrib/scaling/scaling.pl

@@ -25,8 +25,8 @@ my @csvrow;
 my @tests = qw(/bin/true ./orte_no_op ./mpi_no_op ./mpi_no_op ./mpi_no_op);
 my @options = ("", "", "", "-mca mpi_add_procs_cutoff 0 -mca pmix_base_async_modex 1", "-mca mpi_add_procs_cutoff 0 -mca pmix_base_async_modex 1 -mca async_mpi_init 1 -mca async_mpi_finalize 1");
 my @starters = qw(mpirun orterun srun aprun);
-my @starteroptions = ("--map-by node --novm",
-                      "--hnp file:dvm_uri --map-by node",
+my @starteroptions = ("--pernode --novm",
+                      "--hnp file:dvm_uri --pernode",
                       "--distribution=cyclic",
                       "-N 1");