[transaction] move RQLRewriter in Transaction
This remove the last ``AttributeError`` magic. The ``RQLRewriter`` needs a Session. Its
reset is handled in ``Session`` code to handle that
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