Imagebuilder removes tags it just applied.

QA tests were failing, per: https://jenkins.opencord.org/job/xos-api-sanity-pipeline/3279/console

Basically, the Docker API in python doesn't let you remove a tag from a specific image specified by the Image ID, only by removing the tag, which could be any image if other operations have occurred.

If you're adding/removing tags without refreshing the list of images between every operation, you might tag one image, which removes the tag from another image, but that's a tag you just applied.

Check to see if a good image has been found, which would have caused you to tag it with the build_tag, which would have already removed the build_tag from the other image.