Portals 4 doesn't have a BTL, need to default to MTL, rather than finding some stupid slow BTL. THis selection logic sucks.

This commit was SVN r28704.

ompi/mca/pml/cm/pml_cm_component.c

@@ -155,7 +155,8 @@ mca_pml_cm_component_init(int* priority,
         *priority = -1;
         return NULL;
     } else if((strcmp(ompi_mtl_base_selected_component->mtl_version.mca_component_name, "psm") == 0) ||
-              (strcmp(ompi_mtl_base_selected_component->mtl_version.mca_component_name, "mxm") == 0)) {
+              (strcmp(ompi_mtl_base_selected_component->mtl_version.mca_component_name, "mxm") == 0) ||
+              (strcmp(ompi_mtl_base_selected_component->mtl_version.mca_component_name, "portals4") == 0)) {
         /*
          * If MTL is MXM or PSM then up our priority
          * For every other communication layer having MTLs and BTLs, the user/admin