[test/querier] use the new connection api (part 1/3) In devtools/repotest, we provide a simple `.qexecute` with autocommit, and we use it (where possible) in unittest_querier. Note that the .session object is a real session, not the magic property found in CubicWebTC test classes.

#!/usr/bin/env python
from cubicweb.cwctl import run
import sys
run(sys.argv[1:])