bt5_config: Add connection argument which can be used while calling it from context with no aq_parent

bt5_config: Udpate erp5_full_text_mroonga_catalog by removing catalog path and update bt5list explicitly

bt5_config: Update _bootstrap for portal_types and portal_property_sheets to use bootstrap_bm instead of Business Template(s)

bt5_config: Update bootstrap_bm to use Business Manager for bootstrapping portal_types and portal_properties

This is important as we need this BT during creating new erp5-site and
we are only able to look for it in the bootstrap directory if we use
the function getBootstrapBusinessTemplateUrl from ERP5Site.