[STACK-3375] Fix health monitor missing

[ytsai-a10]

Description

• Required: Severity Level: Critical
• Required: Issue Description: Health Monitor will not configured on slb servers if Health Monitor creation command is after the member creation commands. This is introduced after: https://github.com/a10networks/a10-octavia/pull/560/files Previously we have logic to update service-group health monitor. But when move hm from service-group to slb server. We didn't implement the logic for membre.

Jira Ticket

https://a10networks.atlassian.net/browse/STACK-3375

Technical Approach

For CreateAndAssociateHealthMonitor(), we need to update members in the pool with the health monitor.

Config Changes

N/A

Test Cases

• verify commands:

  openstack loadbalancer create --vip-subnet-id tp91 --name vip1
  openstack loadbalancer listener create --protocol HTTP --protocol-port 80 --name vport1 vip1
  openstack loadbalancer pool create --protocol HTTP --lb-algorithm SOURCE_IP_PORT --listener vport1 --name pool1
  openstack loadbalancer member create --address 192.168.90.18 --protocol-port 8080 pool1
  openstack loadbalancer healthmonitor create --delay 30 --timeout 3 --max-retries 3 --type HTTP pool1 --name hm1
  openstack loadbalancer member create --address 192.168.90.19 --protocol-port 8080 pool1

Manual Testing

• result:

  health monitor 6a499b2b-f2de-45d0-b5c6-d6e108ff5cb6
  override-port 80
  interval 30 timeout 3
  method http port 80 expect response-code 200 url GET /
  !
  slb server ecc25_192_168_90_18 192.168.90.18
  health-check 6a499b2b-f2de-45d0-b5c6-d6e108ff5cb6
  port 8080 tcp
  !
  slb server ecc25_192_168_90_19 192.168.90.19
  health-check 6a499b2b-f2de-45d0-b5c6-d6e108ff5cb6
  port 8080 tcp
  !
  slb service-group a10fc2c3-c321-4c73-8416-e7777e490f91 tcp
  method src-ip-hash
  member ecc25_192_168_90_18 8080
  member ecc25_192_168_90_19 8080
  !
  slb virtual-server 36cb4911-8546-4ff0-bd7b-f482318b2d22 192.168.91.78
  port 80 http
  name 5c3932b2-edba-4b16-b110-b77e8dd20b81
  extended-stats
  source-nat auto
  service-group a10fc2c3-c321-4c73-8416-e7777e490f91