Minor fixes. Only one person can have wind walker now. Tokens spawn at 30s rather than 15

#story[1293]

src/main/java/seng302/model/token/TokenType.java

@@ -9,7 +9,7 @@ public enum TokenType {
     BOOST(0, "Boost", 10_000),
     HANDLING(1, "Handling", 10_000),
     BUMPER(2, "Bumper", 10_000),
-    WIND_WALKER(3, "Wind Walker", 30_000),
+    WIND_WALKER(3, "Wind Walker", 10_000),
     RANDOM(4, "Random", 10_000);
 
     private int value;