[devtools] call turn_repo_off in tearDown (closes #4673491)
lets it catch leaked sessions even when running a single test
#! /bin/sh -e#if [ "$1" = configure ]; then if which install-docs >/dev/null 2>&1; then install-docs -i /usr/share/doc-base/cubicweb-doc fifi#DEBHELPER#exit 0