add missing coll test
try not to copy from outside of an array
Add mpi alltoallv pair_light_barrier pair_mpi_barrier pair_one_barrier
Add mpi alltoallv pair
Add mpi alltoallv ring ring-light-barrier ring-mpi-barrier ring-one-barrier
Remove mpi alltoall{,w}_pairwise (identical to ring)
Add mpi allgatherv pair ring
Add teshsuite missing files
Remove unused file.

To finalize commit 386b9bb016d5acdc4929226fa4347a8f6d79bd21
"Remove mpi alltoall{,w}_pairwise (identical to ring)".