added back the light in testenvmap

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@10510 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/test/jme3test/light/TestEnvironmentMapping.java

@@ -3,6 +3,7 @@ package jme3test.light;
 import com.jme3.app.SimpleApplication;
 import com.jme3.asset.TextureKey;
 import com.jme3.input.ChaseCamera;
+import com.jme3.light.DirectionalLight;
 import com.jme3.material.Material;
 import com.jme3.math.Vector3f;
 import com.jme3.post.FilterPostProcessor;
@@ -56,6 +57,10 @@ public class TestEnvironmentMapping extends SimpleApplication {
         
         fpp.addFilter(bf);
         
+        DirectionalLight l = new DirectionalLight();
+        l.setDirection(new Vector3f(0, -1, -1));
+        rootNode.addLight(l);
+        
         viewPort.addProcessor(fpp);
     }
 }