ovn: Add sb_relay_group_id to environment

In order to make logs readable via fluentd, we need to precreate
them in Kolla's extend_start.sh - and since we run dynamic number
of relays - we need to pass the relay group id to know which file
should be precreated.

Change-Id: I8670e807facee8096b102fd5648cd41b76ca888c

Author: mnasiadka

ansible/roles/ovn-db/defaults/main.yml

@@ -25,6 +25,8 @@ ovn_db_services:
     container_name: ovn_sb_db_relay
     group: ovn-sb-db-relay
     enabled: "{{ enable_ovn_sb_db_relay | bool }}"
+    environment:
+      RELAY_ID: "{{ ovn_sb_db_relay_group_id | default('1') }}"
     image: "{{ ovn_sb_db_relay_image_full }}"
     iterate: true
     iterate_var: "{{ ovn_sb_db_relay_count | int }}"

ansible/roles/ovn-db/handlers/main.yml

@@ -33,6 +33,7 @@
   kolla_container:
     action: "recreate_or_restart_container"
     common_options: "{{ docker_common_options }}"
+    environment: "{{ service.environment }}"
     name: "{{ service.container_name }}_{{ item }}"
     image: "{{ service.image }}"
     volumes: "{{ service.volumes | reject('equalto', '') | list }}"