set 'verify=lib' in test dictionary for RADIUS

and change check order for loading protocol libraries.
Try to load them, even if they're not required.  And error out
only if they fail to load AND they're required.

This change makes it a bit more forgiving.

src/lib/util/dict_tokenize.c

@@ -1331,7 +1331,7 @@ static int dict_read_process_protocol(char **argv, int argc)
 	 *	Some protocols don't need them, so it's OK if the
 	 *	validation routines don't exist.
 	 */
-	if (require_dl && (dict_dlopen(dict, argv[0]) < 0)) {
+	if ((dict_dlopen(dict, argv[0]) < 0) && require_dl) {
 	error:
 		talloc_free(dict);
 		return -1;

src/tests/unit/dictionary

@@ -1,4 +1,4 @@
-PROTOCOL RADIUS 1
+PROTOCOL RADIUS 1	verify=lib
 BEGIN-PROTOCOL	RADIUS
 
 #