Separated RaceLogic from MockRace

- MockRace satisfies refactor requirement for RaceState
- VisualiserRace directly implements Runnable to remove method from MockRace

#story[1094]

racevisionGame/src/main/java/shared/model/Race.java

@@ -19,7 +19,7 @@ import java.util.List;
  * This is a base class inherited by {@link mock.model.MockRace} and {@link visualiser.model.VisualiserRace}.
  * Has a course, state, wind, boundaries, etc.... Boats are added by inheriting classes (see {@link Boat}, {@link mock.model.MockBoat}, {@link visualiser.model.VisualiserBoat}.
  */
-public abstract class Race implements Runnable {
+public abstract class Race {
 
 
     /**
@@ -214,7 +214,7 @@ public abstract class Race implements Runnable {
      * Sets the current race status.
      * @param raceStatusEnum The new status of the race.
      */
-    protected void setRaceStatusEnum(RaceStatusEnum raceStatusEnum) {
+    public void setRaceStatusEnum(RaceStatusEnum raceStatusEnum) {
         this.raceStatusEnum = raceStatusEnum;
     }