[test] Gather tests about mail module From sobjects/test/unittest_notification.py to test/unittest_mail.py where other tests for mail.py are already. Some style fixes along the way.

#! /bin/sh -e
 
case "$1" in
    remove)
	if [ -x "/etc/init.d/cubicweb-ctl" ]; then
	    invoke-rc.d cubicweb-ctl stop || true
	fi
    ;;
esac
 
#DEBHELPER#
 
exit 0