[repo test] Avoid hangs in zmq repo unit test - interaction through the zmq event loop from a different thread is only allowed through add_callback - notify the background thread when the client dies with an exception so it doesn't spin forever

#!/bin/sh -e
if [ "$1" = "purge" ] ; then
        update-rc.d cubicweb remove >/dev/null
fi
 
#DEBHELPER#
 
exit 0