[sobjects] Drop custom unique constraint checks in user registration service This constraints (on unique CWUser's login and EmailAddress's login) are handled by the backend. This follows "[hooks/integrity] kill CheckUniqueHook". Extend test for the ValidationError along the way.

#! /bin/sh -e

case "$1" in
    configure|abort-upgrade|abort-remove|abort-deconfigure)
        update-rc.d cubicweb defaults 99 >/dev/null
    ;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 1
    ;;
esac

#DEBHELPER#

exit 0