add IUserFriendlyError adapter for violation of check constraints
This way we get back the same error messages we get from the python
check.
Related to #5154406
#! /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
fi
fi
#DEBHELPER#
exit 0