Failures in startup/shutdown/releaseip/takeip are currently
incorrectly ignored.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12837



Signed-off-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
(cherry picked from commit 22f2068d)