Added test for WindCommand

#story[1096]

racevisionGame/src/main/java/mock/model/commandFactory/WindCommand.java

@@ -12,6 +12,8 @@ public class WindCommand implements Command {
     private MockBoat boat;
     private int direction;
 
+    private double offset = 3.0;
+
     public WindCommand(MockRace race, MockBoat boat, boolean upwind) {
         this.race = race;
         this.boat = boat;
@@ -23,7 +25,6 @@ public class WindCommand implements Command {
         double wind = race.getWindDirection().degrees();
         double heading = boat.getBearing().degrees();
 
-        double offset = 3;
         if(wind - heading < 0) offset *= -1 * direction;
         boat.setBearing(Bearing.fromDegrees(heading + offset));
     }