Bug 210496 Add hasStyle property in reportItemModel extension point
When chart gets reportItem's properties by extending ReportItem, style properties are null. Hence, model needs to add hasStyle property in reportItemModel extension point
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ElementDefn.java
{
		nameConfig.nameOption = choice;
	}
	/**
	 * Sets whether the user can extend elements of this type.
	 * 
	 * @param flag
	 *            True if the element can be extended (default), or false if the
	 *            element cannot be extended.
	 */
	void setCanExtend( boolean flag )
	{
		allowExtend = flag;
	}
	/**
	 * Returns whether elements of this class can be extended.
	 * 
	 * @return True if the element can be extended, false if not.
	 */
	public boolean canExtend( )
	{
		if ( nameConfig.getNameSpaceID( ) == MetaDataConstants.NO_NAME_SPACE )
			return allowExtend;
		
		
		IElementDefn holderDefn = getNameConfig( ).getNameContainer( );
		return allowExtend
				&& holderDefn != null
				&& holderDefn.isKindOf( MetaDataDictionary.getInstance( )
						.getElement( ReportDesignConstants.MODULE_ELEMENT ) );