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/PeerExtensionLoader.java
{
					ExtensionChoice choiceDefn = new ExtensionChoice(
							( (PeerExtensionElementDefn) elementDefn )
									.getReportItemFactory( ).getMessages( ) );
					if ( loadChoice( elements[k], choiceDefn, extPropDefn ) )
						choiceList.add( choiceDefn );
				}
				else if ( ELEMENT_TYPE_TAG.equalsIgnoreCase( elements[k]
						.getName( ) ) )
				{
					elementTypes.add( loadElementType( elements[k] ) );
				}
			}
			
			String detailType = propTag.getAttribute( DETAIL_TYPE_ATTRIB );
			switch ( propType.getTypeCode( ) )
			{
				case IPropertyType.CHOICE_TYPE :
					
					
					if ( ( !StringUtil.isBlank( detailType ) && choiceList
							.size( ) > 0 )
							|| ( StringUtil.isBlank( detailType ) && choiceList
									.size( ) <= 0 ) )
					{
						handleError( new ExtensionException(
								new String[]{detailType},
								ExtensionException.DESIGN_EXCEPTION_INVALID_CHOICE_PROPERTY ) );
						return null;
					}