[server/test] don't leak timeout from one test class to the next Reset SQL_CONNECT_HOOKS after we're done with this test class so the next one doesn't inherit a timeout it doesn't want.

usr/bin/cubicweb-ctl usr/bin/
usr/lib/python2*/*-packages/cubicweb/cwctl.py
../cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl