[master] change "fast" to "map"

3475.	[cleanup]	Changed name of 'map' zone file format (previously
			'fast'). [RT #32458]

bin/tests/system/masterformat/ns3/named.conf

@@ -41,14 +41,14 @@ controls {
 
 zone "example" {
 	type master;
-	masterfile-format fast;
-	file "example.db.fast";
+	masterfile-format map;
+	file "example.db.map";
 };
 
 zone "dynamic" {
 	type master;
-	masterfile-format fast;
-	file "dynamic.db.fast";
+	masterfile-format map;
+	file "dynamic.db.map";
 	allow-update { any; };
 };