Add support to authenticate against third party QA container registry

What does this MR do and why?

As part of Adding ability for QA::Service::DockerRun::Base to authenticate against private registries this MR enables the QA tests to authenticate against the private QA container registry.

This will be needed to finalize this MR to fix the Jenkins spec.

It also

• closes a gap for QA::Service::Shellout to mask secrets when logging a command
• provides a module to include into classes that inherit from DockerRun::Base which supports authenticating.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.