mpiCheckPhaseHook: add parameters to bypass errors in sandbox

makeSetupHook {

  name = "mpi-checkPhase-hook";

  substitutions = {

    topology = ./topology.xml;

  };

} ./mpi-check-hook.sh

      # Disable CPU pinning

      export OMPI_MCA_hwloc_base_binding_policy=none

      export PRTE_MCA_hwloc_default_binding_policy=none

      # OpenMPI get confused by the sandbox environment and spew errors like this (both to stdout and stderr):

      #     [hwloc/linux] failed to find sysfs cpu topology directory, aborting linux discovery.

      #     [1729458724.473282] [localhost:78   :0]       tcp_iface.c:893  UCX  ERROR scandir(/sys/class/net) failed: No such file or directory

      # These messages contaminate test output, which makes the difftest to fail.

      # The solution is to use a preset cpu topology file and disable ucx model.

      # Disable sysfs cpu topology directory discovery.

      export PRTE_MCA_hwloc_use_topo_file="@topology@"

      # Use the network model ob1 instead of ucx.

      export OMPI_MCA_pml=ob1

      ;;

    MPICH)

      # Fix to make mpich run in a sandbox

<?xml version="1.0" encoding="UTF-8"?>

<!DOCTYPE topology SYSTEM "hwloc2.dtd">

<topology version="2.0">

  <object type="Machine" os_index="0" cpuset="0x00000001" complete_cpuset="0x00000001" allowed_cpuset="0x00000001" nodeset="0x00000001" complete_nodeset="0x00000001" allowed_nodeset="0x00000001" gp_index="1">

    <object type="Core" cpuset="0x00000001" complete_cpuset="0x00000001" nodeset="0x00000001" complete_nodeset="0x00000001" gp_index="2">

      <object type="NUMANode" os_index="0" cpuset="0x00000001" complete_cpuset="0x00000001" nodeset="0x00000001" complete_nodeset="0x00000001" gp_index="4"/>

      <object type="PU" os_index="0" cpuset="0x00000001" complete_cpuset="0x00000001" nodeset="0x00000001" complete_nodeset="0x00000001" gp_index="3"/>

    </object>

  </object>

</topology>