Refactor event max lobbies - is no longer a range

It's no longer a range because it:
1. Makes no sense for it to be a range
2. Makes for simpler scripts since returning a JS array is a hassle with Graal

scripts/event/3rdJob_bowman.js

@@ -30,10 +30,10 @@ var maxMapId = 108010101;
 
 var eventTime = 20; //20 minutes
 
-var lobbyRange = [0, 7];
+const maxLobbies = 7;
 
-function setLobbyRange() {
-        return lobbyRange;
+function getMaxLobbies() {
+    return maxLobbies;
 }
 
 function init() {