orte is gone, and we don't want to require other
RM's to either use a prrte specific env, or to
set their own.
OMPI_MCA_orte_ess_num_procs -> OMPI_MCA_num_procs
OMPI_MCA_orte_cpu_type -> OMPI_MCA_cpu_type
See PRRTE PR's:
https://github.com/openpmix/prrte/pull/443https://github.com/openpmix/prrte/pull/440
Signed-off-by: Austen Lauria <awlauria@us.ibm.com>