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
protected static final String VISIBILITY_ATTRIB = "visibility"; 
		protected static final String DEFAULT_DISPLAY_NAME_ATTRIB = "defaultDisplayName"; 
		protected static final String IS_ENCRYPTABLE_ATTRIB = "isEncryptable"; 
		protected static final String TOOL_TIP_ID_ATTRIB = "toolTipID"; 
		protected static final String RETURN_TYPE_ATTRIB = "returnType"; 
		protected static final String TAG_ID_ATTRIB = "tagID"; 		
		protected static final String IS_STATIC_ATTRIB = "isStatic"; 
		protected static final String DEFAULT_STYLE_ATTRIB = "defaultStyle"; 
		protected static final String IS_NAME_REQUIRED_ATTRIB = "isNameRequired"; 
		protected static final String EXTENDS_FROM_ATTRIB = "extendsFrom"; 
		protected static final String DETAIL_TYPE_ATTRIB = "detailType"; 
		protected static final String SUB_TYPE_ATTRIB = "subType"; 
		protected static final String IS_LIST_ATTRIB = "isList"; 
		private static final String HAS_OWN_MODEL = "hasOwnModel"; 
		private static final String CONTEXT_ATTRIB = "context"; 
		/**
		 * List of the property types that are allowed for the extensions.
		 */
		List allowedPropertyTypes = null;
		/**
		 * List of the property types that are allowed for sub-type for the
		 * extensions.
		 */
		List allowedSubPropertyTypes = null;
		/**
		 * Loads the extended element and its properties.
		 * 
		 * @param elementTag
		 *            the element tag
		 * @throws MetaDataException