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
/**
	 * Justifies whether this element definition is container or not. True if
	 * this elmement defines slot or any element type property.
	 */
	protected boolean isContainer = false;
	/**
	 * 
	 */
	protected LinkedHashMap cachedContainerProperties = null;
	/**
	 * Config information about the element name management.
	 */
	protected NameConfig nameConfig = new NameConfig( );
	/**
	 * Sets the Java class which implements this element.
	 * 
	 * @param theClass
	 *            the Java class to set
	 */
	void setJavaClass( String theClass )
	{
		assert !isBuilt;
		javaClass = theClass;
	}
	/**
	 * Sets the name of the style which "selects" this element.
	 * 
	 * @param value
	 *            The predefined style name.
	 */