Fixes #15135 - Fix JS error in datatables
Lack of a tbody caused a 'typeerror: k is undefined' in datatables.
Fixes #14181 - Validate registry URL and attempt login
In order to avoid users trying to create containers in an externalregistry that doesn't exist, we should provide some preventativemeasures.
Fixes #8393: added support for basic auth for standalone registries
Fixes #8632 - Move docker tables out of foreman-docker
Fixes #7647: Added support for external registries
Fixes #7986 - Save container UUID and display managed containers
Refs #7642 - Refactor image/tag and tests
Refs #7642 - Create docker image and tag models
Fixes #7895 - Deleted containers message and redirect
Fixes #7912 - Wizard path error and tests
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