This modifies mini-mirror so that instead of parsing through .txt
documents to build the mirror, it instead has one yaml file consisting
of multiple yaml documents with a pre-defined structure that has all
of the same information. This will allow for easier modification and
visibility into the configuration of mini-mirror.
Along with that, this enables the manual setting of CodeName and Label
values of the mirror, as well as the ability to change the name of the
image that the build.sh script creates
Change-Id: I08646258492e8938b8892749172aea23e363af3d
d503870bfe