Implement "off" to PlotWeather flag and make it default

- Players with "player weather" will no longer have their weather reset on plots that do not set the PlotWeather flag

Bukkit/src/main/java/com/plotsquared/bukkit/player/BukkitPlayer.java

@@ -276,10 +276,12 @@ public class BukkitPlayer extends PlotPlayer<Player> {
             case RAIN:
                 this.player.setPlayerWeather(WeatherType.DOWNFALL);
                 break;
-            case RESET:
-            default:
+            case WORLD:
                 this.player.resetPlayerWeather();
                 break;
+            default:
+                //do nothing as this is PlotWeather.OFF
+                break;
         }
     }