Adding binding_db to external-db.yml ops file

[cweibel]

The v14.4.0 release of autoscaler introduces a db named binding_db, if you are using an external db, like RDS, and the ops file in operations/external-db.yml the templating errors out during deployment with:

Task 628502 | 15:28:11 | Error: Unable to render instance groups for deployment. Errors are:
  - Unable to render jobs for instance group 'metricsforwarder'. Errors are:
    - Unable to render templates for job 'metricsforwarder'. Errors are:
      - Error filling in template 'metricsforwarder.yml.erb' (line 9: Can't find property '["autoscaler.binding_db.port"]')

By adding binding_db to the external-db.yml ops file, there is no longer a bosh templating error when not using the built in postgres instance.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[asalan316]

Hi @cweibel , thanks for your contribution.

Unfortunately, the acceptance test are not triggering. Probably, because that they are not configured to accept contribution from the fork branches.

But I have created a PR#3305 to validate it.

If GHA passes, I will merge the PR.

[asalan316]

@cweibel The fix should be in release 14.4.1

Thanks for your contribution 👍