This script generates docker config for Contrail Operator install manifests for Openshift encoded in base64 format.
DOCKER_CONFIG is encoded JSON data in this format:
{"auths":{"<registry>":{"username":"<username>","password":"<password>",auth":"<base64 encoded username:password>"}}}
Run script and interactively pass necessary data. Afterwards, copy output and paste into config file for install-manifests script.