Don't warn about missing UUIDs for non-existent containers.
Don't warn about missing UUIDs for non-existent containers.

It's not possible for the container or its members to have UUIDs
until they have been created.

AdamWill/blivet,vojtechtrefny/blivet,vpodzime/blivet,rvykydal/blivet,vpodzime/blivet,rhinstaller/blivet,rhinstaller/blivet,jkonecny12/blivet,jkonecny12/blivet,vojtechtrefny/blivet,AdamWill/blivet,rvykydal/blivet