The ovs-appctl command may fail when setting an interface as a
slave interface in a bond and the primary has not come up yet
from a preceding ifup call. Retry the ovs-appctl and log an
error if the command still fails.
Change-Id: I3f04a5d6c3a6dc324a2978fdecd2a77df0bf1ba0
Closes-Bug: 1797955
(cherry picked from commit 25c70ea076)
(cherry picked from commit e78d45f368)