Adds a few missing features into the shader-based renderer relying on JOGL 2.0

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@9890 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/jogl/com/jme3/renderer/jogl/JoglRenderer.java

@@ -2411,7 +2411,7 @@ public class JoglRenderer implements Renderer {
         }
 
         statistics.onMeshDrawn(mesh, lod);
-//        if (GLContext.getCapabilities().GL_ARB_vertex_array_object){
+//        if (gl.isExtensionAvailable("GL_ARB_vertex_array_object")){
 //            renderMeshVertexArray(mesh, lod, count);
 //        }else{
         renderMeshDefault(mesh, lod, count);