Add support for multiple site properties in imported BTs.

product/ERP5/Document/BusinessTemplate.py

@@ -3106,7 +3106,7 @@ class SitePropertyTemplateItem(BaseTemplateItem):
       LOG('Business Template', 0, 'Skipping file "%s"' % (file_name, ))
       return
     xml = parse(file)
-    property_node = xml.getroot()[0]
+    for property_node in xml.getroot().findall('property'):
       property_id = property_node.find('id').text
       prop_type = property_node.find('type').text
       value_node = property_node.find('value')