fix access to watchdog event actions

The data structure 'actionEnum' is a a list, but it was accessed as
function.

Change-Id: I3f64b6c6508c23285b9a4a159be7a16cdf64ae9c
Signed-off-by: Laszlo Hornyak <lhornyak@redhat.com>
Reviewed-on: http://gerrit.ovirt.org/14134
Reviewed-by: Doron Fediuck <dfediuck@redhat.com>
Reviewed-by: Martin Sivák <msivak@redhat.com>
Reviewed-by: Dan Kenigsberg <danken@redhat.com>