HCOLL-167 simplified the map builder by making "file" very much an option parameter, is it not REQUIRED for all types of maps. Also updated the many of the TCP replication test to remove the user of file() as its simply not required for this in many cases.

src/test/java/net/openhft/chronicle/set/SetForTCPSocketReplicationTest3way.java

@@ -49,8 +49,10 @@ public class SetForTCPSocketReplicationTest3way {
             final int serverPort,
             final InetSocketAddress... endpoints) throws IOException {
         return (T) ChronicleSetBuilder.of(Integer.class)
-                .replicators(identifier, of(serverPort, endpoints).
-                        heartBeatInterval(1L, SECONDS)).create(getPersistenceFile());
+                .file(getPersistenceFile())
+                .replicators(identifier, of(serverPort, endpoints)
+                        .heartBeatInterval(1L, SECONDS))
+                .create();
     }