Implemented setSpeed for animationTrack as it needs special treatment

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9258 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/core/com/jme3/cinematic/events/AnimationTrack.java

@@ -149,6 +149,16 @@ public class AnimationTrack extends AbstractCinematicEvent {
        }
     }
 
+    @Override
+    public void setSpeed(float speed) {
+        super.setSpeed(speed);
+        if(channel!=null){
+            channel.setSpeed(speed);
+        }
+    }
+    
+    
+
     @Override
     public void onUpdate(float tpf) {
     }