Issue Summary

This is reproducible on Data Center: (yes) 

Steps to Reproduce

1. Configure the helm chart with parameter set to crowd.additionalCertificates only one certificate.
2. There is no option to mention the multiple certificate.

Expected Results

Property "crowd.additionalCertificates" should be multivalued instead of a single value.

  additionalCertificates:
    secretName: twiki-certificates
    secretName2: .....
    customCmd:
  additionalCertificates2:

Actual Results

You can only define a single value for "crowd.additionalCertificates" in

 crowd.additionalCertificates object {"customCmd":null,"secretName":null}

Workaround

Pull the multiple Certificates into the one Secret as mentioned on the document.