Disable pytest's logs reporting CubicWeb already prints captured logs in stderr upon test failure, so we get them twice. Until we fix our logging management, disabling pytest capture and restore brings the output level back to sanity.

[pyramid] Do not issue security warnings in test mode When some session or authtk secret is missing in Pyramid settings, scary "!! SECURITY WARNING !!" are issued. This is arguably pointless in tests. So disable them in this case.

[ssplanner] Prevent execution of write queries involving computed relations Previously, setting a computed relation upon entity creation or modification (using the ORM or an RQL query) would usually fail with an operational error in the backend ("no such table"). However, under some mysterious circumstances (like passing a string as value in cw_set for a computed relation), the RQL to SQL transformation would simply drop the clause. To prevent this to happen, we add a check for computed relation before adding a relation to an execution plan. This check raises a QueryError. It happens in several places: * in querier.InsertPlan.add_relation_def() (called from several places in ssplanner steps) for INSERT queries, * in ssplanner.UpdateStep.execute() for SET queries and, * in ssplanner.SSplanner.build_delete_plan() for DELETE queries. Tests added to unittest_querier.py because unittest_sslplanner.py looked inappropriate (it has only unit tests) and the former already had a NonRegressionTC class.