Support for ServiceAccounts

[ffppmm]

Is your feature request related to a problem? Please describe.
openshift needs a serviceAccount to let the openldap PODs to run as user 1001

Describe the solution you'd like
I have seen that there is support for creating a service account and giving it a name, but in the template of the statefulset the service account is commented?!?

Describe alternatives you've considered
None

Additional context
I tried to get the helmChart to get running on openshift and wasn't able to, only if I edit the original Chart:
https://github.com/jp-gouin/helm-openldap/blob/master/templates/statefulset.yaml#L146

Would be a nice feature if you implement this,

regards Philipp