Bug 155958 Backward compatibility on 'resultset' property
Before 2.0 build, we always take the 'resultset' property on as resultset hint function. But currently, it is different.'resultset' property is to keep the oda resultset metadata,'resultsetHints' replace the function of 'resultset' as the real hints property. Currently Model has done backward compatibility on transform between 'resultset' and 'resultsetHints' by copying 'resultset' to 'resultsetHints', but 'resultset''s value still exist, it will break the current impl when fetching this property, because now we have taken this property to save the metadata of Oda resultset not hints info. To make old report design working fine, we should clear 'resultset' property, then we can use it as real resultset property.
model/org.eclipse.birt.report.model.adapter.oda/src/org/eclipse/birt/report/model/adapter/oda/ModelOdaAdapter.java
* 
	 * @param setDesign
	 *            the ODA dataSet design.
	 * @param module
	 *            the module where the Model handle resides.
	 * @return a new <code>OdaDataSourceHandle</code>
	 * @throws SemanticException
	 *             if any value in <code>sourceDesign</code> is invalid
	 *             according ROM.
	 * @throws IllegalStateException
	 *             if <code>setDesign</code> is not valid.
	 */
	public OdaDataSetHandle createDataSetHandle( DataSetDesign setDesign,
			ModuleHandle module ) throws SemanticException,
			IllegalStateException
	{
		if ( setDesign == null )
			return null;
		
		DesignUtil.validateObject( setDesign );
		OdaDataSetHandle setHandle = module.getElementFactory( ).newOdaDataSet(
				setDesign.getName( ), setDesign.getOdaExtensionDataSetId( ) );
		if ( setHandle == null )
			return null;
		adaptDataSetDesign( setDesign, setHandle );
		return setHandle;
	}
	/**
	 * Copies values of <code>setDesign</code> to <code>setHandle</code>.
	 * Values in <code>setDesign</code> are validated before maps to values in