Changed test to work with the new getHeading method, and removed an unused import that was causing tests to fail

- There was a com.sun import that we were no longer using that was causing issues

Tags: story[466]

src/test/java/seng302/EventTest.java

@@ -25,7 +25,7 @@ public class EventTest {
         Boat boat = new Boat("testBoat");
         Event event = new Event(1231242.2, boat, new SingleMark("mark1", 142.5, 122.1), new SingleMark("mark2", 121.9,99.2), 0);
 
-        assertEquals(event.getBoatHeading(), 221.9733862944651, 1e-15);
+        assertEquals(event.getBoatHeading(), 318.02661370553494g, 1e-15);
     }
 
     @Test