fedoratest was yet another dummy distribution used by unit tests. After
the rework of test_distro, there is no reason to not use it as the only
distro implementation for testing purposes.
Remove fedoratest distro and replace it with test_distro in all affected
tests.
Signed-off-by: Tomas Hozza <thozza@redhat.com>
Empty names are not allowed, and blueprint names should only contain
characters matching: ^[a-zA-Z0-9._-]+$
This also adds tests for the various places where the blueprint name
could potentially be wrong.
Also adds new types to weldr/json.go to support them.
ComposeEntry had to be duplicated instead of used as-is because it
enforces image type strings that do not match what the API uses (the API
types are all lower case, the internal names are capitalized).
