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
if ( styleDefn.properties.containsKey( property.getName( ) ) )
			{
				throw new MetaDataException( new String[]{property.getName( ),
						this.name},
						MetaDataException.DESIGN_EXCEPTION_DUPLICATE_PROPERTY );
			}
		}
		super.addProperty( property );
		if ( property.getType( ) != null && property.isElementType( )
				&& !isContainer )
			isContainer = true;
	}
	/**
	 * Returns the semantic validation trigger definition collection.
	 * 
	 * @return the semantic validation trigger definition collection
	 */
	public SemanticTriggerDefnSet getTriggerDefnSet( )
	{
		if ( triggerDefnSet == null )
			triggerDefnSet = new SemanticTriggerDefnSet( );
		return triggerDefnSet;
	}
	/**
	 * Adds an invisible property to the list.
	 * 
	 * @param propName
	 *            the property name
	 * @param propVisibility
	 *            the level that how to show the property in the property sheet.