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
ExtensionPropertyDefn extPropDefn = loadProperty(
							elementTag, elements[i], elementDefn );
					if ( extPropDefn == null )
						continue;
					extPropDefn.setGroupName( groupName );
					extPropDefn.setGroupNameKey( displayNameID );
					extPropDefn.setGroupDefauleDisplayName( defaultDisplayName );
					elementDefn.addProperty( extPropDefn );
				}
			}
		}
		/**
		 * Loads one property definition of the given element.
		 * 
		 * @param elementTag
		 *            the element tag
		 * @param propTag
		 *            the property tag
		 * @param elementDefn
		 *            element definition
		 * @return the property definition
		 * @throws ExtensionException
		 *             if the class some attribute specifies can not be
		 *             instanced.
		 */
		ExtensionPropertyDefn loadMethod( IConfigurationElement elementTag,
				IConfigurationElement propTag, ExtensionElementDefn elementDefn )
		{
			String name = propTag.getAttribute( NAME_ATTRIB );
			String displayNameID = propTag