fcoll: make vulcan the default component

make vulcan the default component except for Lustre file systems.

Signed-off-by: Edgar Gabriel <egabriel@central.uh.edu>

ompi/mca/fcoll/base/fcoll_base_file_select.c

@@ -268,6 +268,11 @@ int mca_fcoll_base_query_table (struct ompio_file_t *file, char *name)
 	    return 1;
 	}
     }
+    if (!strcmp (name, "vulcan")) {
+        if ( (LUSTRE != file->f_fstype)) {
+            return 1;
+        }
+    }
     if (!strcmp (name, "dynamic")) {
         if ((int)file->f_cc_size < file->f_bytes_per_agg &&
             file->f_cc_size >= file->f_stripe_size) {

ompi/mca/fcoll/two_phase/fcoll_two_phase_module.c

@@ -63,8 +63,8 @@ mca_fcoll_two_phase_component_file_query (ompio_file_t *fh, int *priority)
     }
 
     if (mca_fcoll_base_query_table (fh, "two_phase")) {
-        if (*priority < 50) {
-            *priority = 50;
+        if (*priority < 35) {
+            *priority = 35;
         }
     }