Set octavia services' stop grace period to 300sec
Octavia worker, house-keeping and health-monitor serivices may use some
long taskflow's flows to handle load balancers and amphorae (launch VMs,
etc...). Those flows should not be interrupted when restarting those
services (i.e when updating an overcloud, or restarting services because
of certificates rotation), it might cause resource leaks that cannot be
fixed by an admin.
As default container stop timeout is defined to 10 seconds, this timeout
value needs to be increased for octavia services (except octavia api) to
ensure a graceful shutdown.
This new value has been set to 300 seconds according to the octavia
worker default configuration introduced in
(cherry picked from commit