Bug 189751 cube enhancement: Groups and Summaries category; an empty summary field is being created.
Based on bug Id# 187412: Cube builder enhancement While reviewing the cube builder enhancements, I found some things that are not updated as the mock up. Please see the attached document. Under Groups and summaries category: 1. If new a cube, under 'groups and Summaries' category, by default an empty summary field is being created. No empty groups and summaries should be there to start with. Make it consistent as 'Groups (dimension): no empty group is there. 2. The category title should repeats itself as Groups and Summaries 3. Primary Dataset has to be listed as (Primary)
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ElementFactory.java
* 
	 * @param name
	 *            hierarchy name
	 * @return a handle to the hierarchy element
	 */
	public TabularHierarchyHandle newTabularHierarchy( String name )
	{
		TabularHierarchy element = new TabularHierarchy( name );
		module.makeUniqueName( element );
		return element.handle( module );
	}
	/**
	 * Creates a new level element. The name is required. If the
	 * <code>name</code> is null, we will make a unique name for it.
	 * 
	 * @param name
	 *            the level name
	 * @return a handle to the level element
	 * @deprecated replaced by
	 *             {@link #newTabularLevel(org.eclipse.birt.report.model.api.olap.DimensionHandle, String)}
	 */
	public TabularLevelHandle newTabularLevel( String name )
	{
		TabularLevel element = new TabularLevel( name );
		module.makeUniqueName( element );
		return element.handle( module );
	}
	/**
	 * Creates a new level element within the given dimension handle. The name
	 * is required. If the <code>name</code> is null, we will make a unique