Bug 120216 Group dialog should be showed even dataset is not set.
- Add a table report item - do not set the data set - try creating a new table group. - An error is shown Expected behavior - As part of the template requirements, we dont want UI to do the validation. User should be able to go and define a group, even if the dataset is not defined.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/UIUtil.java
* 
	 * @param pluginId
	 *            the identify of the plugin
	 * 
	 * @return the plug-in provider, or null if the plug-in is not found
	 */
	public static String getPluginProvider( String pluginId )
	{
		return getBundleValue( pluginId,
				org.osgi.framework.Constants.BUNDLE_VENDOR );
	}
	/**
	 * Returns the plug-in name
	 * 
	 * @param pluginId
	 *            the identify of the plugin
	 * 
	 * @return the plug-in name, or null if the plug-in is not found
	 */
	public static String getPluginName( String pluginId )
	{
		return getBundleValue( pluginId,
				org.osgi.framework.Constants.BUNDLE_NAME );
	}
	/**
	 * Returns the plug-in version
	 * 
	 * @param pluginId
	 *            the identify of the plugin
	 *