Simplify test

This commit was SVN r21058.

orte/test/mpi/ziatest.pl

@@ -1,5 +1,5 @@
 #!/usr/bin/perl
 use Time::HiRes qw( gettimeofday );
 ($sec, $microsec) = gettimeofday;
-$cmd = "mpirun -n " . @ARGV[0] . " ./ziatest " . @ARGV[1] . " " . $sec . " " . $microsec;
+$cmd = "mpirun -npernode " . @ARGV[0] . " ./ziatest " . @ARGV[0] . " " . $sec . " " . $microsec;
 system($cmd);