Updating ingresses with the proper backend svc name generation

[alix-graylog]

Updating ingresses with the proper backend svc name generation.

This can be tested with a values value like.

ingress:
  web:
    enabled: true
    hosts:
      - host: graylog-helm.example.com
        paths:
          - path: /
            pathType: Prefix

Then run the following.

helm template graylog/. -f graylog/some-values.yaml

The resulting backend service name should be release-name-graylog-svc.