OSHMEM: spml ikrit: disable rdmap op DCI pool

Instead use single pool for both rdma and send receive ops.
Merge branch 'mellanox-v1.8' of github.com:mellanox-hpc/ompi-release into mellanox-v1.8

Conflicts:
	oshmem/mca/spml/ikrit/spml_ikrit_component.c