tools: notifier startup script startup directory

The notification daemon startup script attempts to change to the ovirt
user home directory to avoid permissions errors.  This directory doesn't
always exist, so it will now use / as a fallback.

Change-Id: Iba8b163881bd31eeb970da82003dd184ffcad9b9
Bug-Url: https://bugzilla.redhat.com/949975
Signed-off-by: Greg Padgett <gpadgett@redhat.com>