Validate makam/form/usul attributes in Musicbrainz periodically

[sertansenturk]

The names are consistent between mu2 and slug as it is part of the automatic score validation. also make sure it is consistent in MusicBrainz.

[sertansenturk]

We have to check this periodically before each release. Move SymbTrData.ipynb to the extras and add the checkers similar to getSymbTrArtistMismatch.ipynb.