Authentication errors are shown after global pull secret is updated in OCP 4

Issue

• When the global pull secret is updated as explained in the documentation, the openshift-apiserver does not reflect it.

• After updating the global pull secret, the oc import-image <images> or oc start-build commands fail with errors similar to the following ones:

  error: tag latest failed: Internal error occurred: registry.redhat.io/rhscl/httpd-24-rhel7:latest: Get https://registry.redhat.io/v2/rhscl/httpd-24-rhel7/manifests/latest: unauthorized: Please login to the Red Hat Registry using your Customer Portal credentials. Further instructions can be found here: https://access.redhat.com/RegistryAuthentication
  imagestream.image.openshift.io/httpd-24-rhel7 imported with errors
  

  error: tag latest failed: Internal error occurred: my-custom-registry.example.com/jenkins-registry/jenkins-agent-image:latest: Get "https://my-custom-registry.example.com/v2/jenkins-registry/jenkins-agent-image/manifests/latest": unknown: Authentication is required
  imagestream.image.openshift.io/jenkins-agent-image imported with errors
  

• A correct pull-secret is already configured but it fails to get image stream.