eliminate unnecessary waiting in allow-query test

- grep in the log to see if configuration is finished rather
  than sleeping for 5 seconds

bin/tests/system/allow-query/ns2/named55.conf.in

@@ -30,7 +30,7 @@ view "internal" {
 
 	zone "normal.example" {
 		type master;
-		file "normal.db";
+		file "generic.db";
 		allow-query { any; };
 	};