With last weeks tag fix, `ourorg/container` ended up having its `repo` reported as `container`.
With this it'll be `ourorg/container` again.
Signed-off-by: Stephan Renatus <srenatus@chef.io>
`must_equal nil` will fail in MiniTest 6. Changing those to `must_be_nil`
quiets down all the warnings we currently see and preps us for Minitest 6.
Signed-off-by: Adam Leff <adam@leff.co>