olsrd-watchdog can trigger when the olsrd service is restarted
Such as when a tunnel comes up, or when a config change is
made to olsrd.
procd already monitors olsrd and makes sure it remains running.
With procd we no longer need olsrd-watchdog and can remove it.
fixes AREDN->ticket:215
Change-Id: I5067d380a22bd0ab5e597746478ef3e1ba05d72d