Ensure consistency between max_procs and univ_size values - since orte wants max_procs, have the proc get that value instead of univ_size

Make the singleton module consistent as well

orte/mca/ess/pmi/ess_pmi_module.c

@@ -154,11 +154,11 @@ static int rte_init(void)
     }
     orte_process_info.my_node_rank = u16;
 
-    /* get universe size */
-    OPAL_MODEX_RECV_VALUE(ret, OPAL_PMIX_UNIV_SIZE,
+    /* get max procs */
+    OPAL_MODEX_RECV_VALUE(ret, OPAL_PMIX_MAX_PROCS,
                           ORTE_PROC_MY_NAME, &u32ptr, OPAL_UINT32);
     if (OPAL_SUCCESS != ret) {
-        error = "getting univ size";
+        error = "getting max procs";
         goto error;
     }
     orte_process_info.max_procs = u32;

orte/mca/ess/singleton/ess_singleton_module.c

@@ -217,14 +217,17 @@ static int rte_init(void)
     }
     orte_process_info.my_node_rank = u16;
 
-    /* get universe size */
-    OPAL_MODEX_RECV_VALUE(ret, OPAL_PMIX_UNIV_SIZE,
+    /* get max procs */
+    OPAL_MODEX_RECV_VALUE(ret, OPAL_PMIX_MAX_PROCS,
                           ORTE_PROC_MY_NAME, &u32ptr, OPAL_UINT32);
     if (OPAL_SUCCESS != ret) {
-        error = "getting univ size";
+        error = "getting max procs";
         goto error;
     }
-    orte_process_info.num_procs = u32;
+    orte_process_info.max_procs = u32;
+
+    /* we are a singleton, so there is only one proc in the job */
+    orte_process_info.num_procs = 1;
     /* push into the environ for pickup in MPI layer for
      * MPI-3 required info key
      */

orte/orted/pmix/pmix_server_register_fns.c

@@ -296,7 +296,7 @@ int orte_pmix_server_register_nspace(orte_job_t *jdata)
     kv = OBJ_NEW(opal_value_t);
     kv->key = strdup(OPAL_PMIX_UNIV_SIZE);
     kv->type = OPAL_UINT32;
-    kv->data.uint32 = jdata->num_procs;
+    kv->data.uint32 = jdata->total_slots_alloc;
     opal_list_append(info, &kv->super);
 
     /* job size */