More detailed output and detecting of duplicate fixtures in manufacturers index test

[fxedel]

No description provided.

[FloEdelmann]

Your changes are looking good but I just recognized we don't yet cover the case that an index file has a manufacturer that is not present in file system.

[fxedel]

@FloEdelmann That's only right for manufacturers without fixtures – e. g., american-dj is mentioned in index (with no fixtures) and in manufacturer data (with nice name and website), but not in file system. I don't think that's wrong as there's no need for empty directories and deleting those manufacturers would mean data loss.

If the index mentions a manufacturer with fixtures that isn't present in file structure, it doesn't directly give an error but the fixtures do. (E. g., if we added 'super-lighting-device' in index to american-dj, the error Index mentions fixture 'super-lighting-device' of manufacturer 'american-dj' which is not present in file structure is given and the test fails.)

[FloEdelmann]

You're right, I guess we already discussed this sometime.