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
https://review.opendev.org/#/c/684201/

Closes-Bug: #1855684
Change-Id: I8911a79328769c910d03168cfa5a421d0dd0f9b6

deployment/octavia/octavia-health-manager-container-puppet.yaml

@@ -132,6 +132,7 @@ outputs:
         step_5:
           octavia_health_manager:
             start_order: 2
+            stop_grace_period: 300
             image: *octavia_health_manager_image
             net: host
             privileged: false

deployment/octavia/octavia-housekeeping-container-puppet.yaml

@@ -131,6 +131,7 @@ outputs:
         step_5:
           octavia_housekeeping:
             start_order: 2
+            stop_grace_period: 300
             image: *octavia_housekeeping_image
             net: host
             privileged: false

deployment/octavia/octavia-worker-container-puppet.yaml

@@ -119,6 +119,7 @@ outputs:
         step_5:
           octavia_worker:
             start_order: 2
+            stop_grace_period: 300
             image: *octavia_worker_image
             net: host
             privileged: false