Install erp5_jquery when adding ERP5Site.

Since erp5_xhtml_style has become requiring erp5_jquery. (in reality required since 2010)

product/ERP5/ERP5Site.py

@@ -2181,7 +2181,7 @@ class ERP5Generator(PortalGenerator):
     template_tool = p.portal_templates
     if template_tool.getInstalledBusinessTemplate('erp5_core') is None:
       for bt in ('erp5_property_sheets', 'erp5_core', p.erp5_catalog_storage,
-                 'erp5_xhtml_style'):
+                 'erp5_xhtml_style', 'erp5_jquery'):
         if not bt:
           continue
         url = getBootstrapBusinessTemplateUrl(bt)