[migration] more rename_entity_type fix
* ensure repository caches and system tables are properly cleanup
* delete relations from/to entities deleted through sql
So we don't ends up with a corrupted db...
Document: cubicweb-doc
Title: CubicWeb documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/cubicweb-documentation/index.html
Files: /usr/share/doc/cubicweb-documentation/*.html