Add a MPI_Comm_split_type MPI_COMM_TYPE_HW_GUIDED test

[jjhursey]

• This is a modified/simplified version of the one in the MPICH Testsuite
  customized for Open MPI.
  • Ref: https://www.mpich.org/downloads/

[jjhursey]

Example output with Open MPI main branch

shell$ mpirun -npernode 2 --host f5n17:20,f5n16:20   ./cmsplit_type
shell$ echo $?
0
shell$ export MPITEST_VERBOSE=1
shell$ mpirun -npernode 2 --host f5n17:20,f5n16:20   ./cmsplit_type
MPI_COMM_TYPE_SHARED (no hint): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_SHARED (no hint): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying MPI Standard value mpi_shared_memory
MPI_COMM_TYPE_HW_GUIDED (mpi_shared_memory): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (mpi_shared_memory): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying value mpi_shared_memory
MPI_COMM_TYPE_HW_GUIDED (mpi_shared_memory): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (mpi_shared_memory): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying value hwthread
MPI_COMM_TYPE_HW_GUIDED (hwthread): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (hwthread): Created shared subcommunicator of size 1
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (hwthread): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (hwthread): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED: Trying value core
MPI_COMM_TYPE_HW_GUIDED (core): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (core): Created shared subcommunicator of size 1
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (core): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (core): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED: Trying value l1cache
MPI_COMM_TYPE_HW_GUIDED (l1cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (l1cache): Created shared subcommunicator of size 1
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (l1cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (l1cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED: Trying value l2cache
MPI_COMM_TYPE_HW_GUIDED (l2cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (l2cache): Created shared subcommunicator of size 1
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (l2cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (l2cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED: Trying value l3cache
MPI_COMM_TYPE_HW_GUIDED (l3cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (l3cache): Created shared subcommunicator of size 1
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (l3cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED (l3cache): Created shared subcommunicator of size 1
MPI_COMM_TYPE_HW_GUIDED: Trying value socket
MPI_COMM_TYPE_HW_GUIDED (socket): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (socket): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying value numanode
MPI_COMM_TYPE_HW_GUIDED (numanode): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (numanode): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying value board
MPI_COMM_TYPE_HW_GUIDED (board): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (board): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying value host
MPI_COMM_TYPE_HW_GUIDED (host): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (host): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying value cu
MPI_COMM_TYPE_HW_GUIDED (cu): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (cu): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying value cluster
MPI_COMM_TYPE_HW_GUIDED (cluster): Created shared subcommunicator of size 2
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED (cluster): Created shared subcommunicator of size 2
MPI_COMM_TYPE_HW_GUIDED: Trying MPI_INFO_NULL
MPI_COMM_TYPE_HW_GUIDED: Trying MPI_INFO_NULL - Passed
-----------------------------------
MPI_COMM_TYPE_HW_GUIDED: Trying invalid key
MPI_COMM_TYPE_HW_GUIDED: Trying invalid key - Passed
-----------------------------------