[pyramid] Avoid shutting down the repository at exit if it's already shutting down
For install `cubicweb-ctl pyramid` command will explicitly call
`repo.shutdown()` so the atexit hook is redundant. Prevent the latter to be
executed when the repository is already shutting down (otherwise one gets an
assertion error).
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/python-cubicweb-documentation/html/index.html
Files: /usr/share/doc/python-cubicweb-documentation/html/*