osc/rdma: Lower priority to 20

The RDMA OSC component is the "general" component, similar to OB1.
The OSC subsystem has gone through some priority inflation over
the years, so try to clean that up. This patch lowers the RDMA
OSC component priority from 101 to 20, leaving the priorities as:

  sm      100
  ucx     60 (if API version > 1.5.0)
  portals 20
  rdma    20

Signed-off-by: Brian Barrett <[email protected]>

ompi/mca/osc/rdma/osc_rdma_component.c

@@ -231,7 +231,7 @@ static int ompi_osc_rdma_component_register (void)
                                            MCA_BASE_VAR_SCOPE_GROUP, &mca_osc_rdma_component.max_attach);
     free(description_str);
 
-    mca_osc_rdma_component.priority = 101;
+    mca_osc_rdma_component.priority = 20;
     opal_asprintf(&description_str, "Priority of the osc/rdma component (default: %d)",
              mca_osc_rdma_component.priority);
     (void) mca_base_component_var_register (&mca_osc_rdma_component.super.osc_version, "priority", description_str,