Bug 212497 Need api to get all referencable report item with cube
Need model provide new api to return all referencable report items for dataset or cube respectively. For instance: getAvailableDataSetBindingReferenceList(); getAvailableCubeBindingReferenceList(); also keep current api: getAvailableDataBindingReferenceList().
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ReportItemHandle.java
* @param handle
	 *            the handle of the cube
	 * 
	 * @throws SemanticException
	 *             if the property is locked.
	 */
	public void setCube( CubeHandle handle ) throws SemanticException
	{
		if ( handle == null )
			setStringProperty( CUBE_PROP, null );
		else
		{
			ModuleHandle moduleHandle = handle.getRoot( );
			String valueToSet = handle.getElement( ).getFullName( );
			if ( moduleHandle instanceof LibraryHandle )
			{
				String namespace = ( (LibraryHandle) moduleHandle )
						.getNamespace( );
				valueToSet = StringUtil.buildQualifiedReference( namespace,
						valueToSet );
			}
			setStringProperty( CUBE_PROP, valueToSet );
		}
	}
	/**
	 * Gets a handle to deal with the item's x (horizontal) position.
	 * 
	 * @return a DimensionHandle for the item's x position.
	 */
	public DimensionHandle getX( )