no loadbalancerIP for service

[maxisam]

Describe the bug
https://github.com/apache/couchdb-helm/blob/master/couchdb/templates/service.yaml

There is no option of loadbalancerIP

We should have something like

  {{- if eq .Values.service.type "LoadBalancer" }}
  {{- if not (empty .Values.service.loadBalancerIP) }}
  loadBalancerIP: {{ .Values.service.loadBalancerIP }}
  {{- end }}
  {{- if .Values.service.loadBalancerSourceRanges }}
  loadBalancerSourceRanges: {{- toYaml .Values.service.loadBalancerSourceRanges | nindent 4 }}
  {{- end }}
  {{- end }}
  {{- if .Values.service.externalIPs }}
  externalIPs: {{- toYaml .Values.service.externalIPs | nindent 4 }}
  {{- end }}