hocuspocus volume mount fails because volume is not defined

[cwalker-ssigroup]

When upgrading to 17.02, the hocuspocus installation fails with an error when we have a defined

egress:
  tls:
    rootCA:
      configMap: ca-pemstore
      fileName: rootCA.pem

the error is

Error: UPGRADE FAILED: failed to create resource: Deployment.apps "openproject-hocuspocus" is invalid: spec.template.spec.containers[0].volumeMounts[1].name: Not found: "ca-pemstore"

When examining the helm chart templates, it appears that the volume for ca-pemstore is not included in the hocuspocus deployment like it is in the other deployment files.