After split and defer, call the builders in sequential order, in the order returned by getBuilderList. This is a quick workaround for the fact that invoice_builder must operate before invoice_tax_builder, and should not have any consequences for delivery where builder order is not important.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@26221 20353a03-c40f-0410-a6d1-a30d3c3de9de