Add support for [slapconsole] config part and aliases (you have variables kvm, mysql, etc, defined from config

This small business template provides minimal configuration requred for Vifib
provided web sites.

In vifib web environment credential are used to manage users.

Put web sites and web pages into vifib_data_web.
Put categories into vifib_data_category.
Put uncategorised data into vifib_data.
Drop vifib_datas.

role/internal is require in order to have loggable users.

Vifib uses erp5_credential and have to be configured.

Users coming from web shall be able to register to vifib web site and shall be
able to request functional Software Instance.

remove vifib_credential because this bt5 is not required anymore. all scripts were moved to erp5_credential and refactored to be generic