CentOS packages that has this binary:
/usr/lib64/mpich/bin/mpitests-osu_scatter
/usr/lib64/mvapich2-psm/bin/mpitests-osu_scatter
/usr/lib64/mvapich2/bin/mpitests-osu_scatter
/usr/lib64/mvapich-psm/bin/mpitests-osu_scatter
/usr/lib64/mvapich/bin/mpitests-osu_scatter
/usr/lib64/openmpi/bin/mpitests-osu_scatter