Rename the auxiliary file download API?

[landreev]

Proposal to rename the current form of the API:

/api/access/datafile/{fileId}/metadata/{formatTag}/{formatVersion}

to

/api/access/auxiliaryfile/{fileId}/{formatTag}/{formatVersion}

Because aux. files do not necessarily have to be "metadata". And in order to avoid potential conflicts with other forms of /api/access/datafile.

[qqmyers]

Since the file id there is still the datafile id, perhaps
/api/access/datafile/{fileId}/auxiliaryfile/{formatTag}/{formatVersion}

or
/api/access/datafile/{fileId}/aux/{formatTag}/{formatVersion} ?

[djbrooke]

Good idea. I don't have strong feelings about what to rename it to, but now's the time.

[landreev]

OK, let's drop the "file", but spell "auxiliary" fully:
/api/access/datafile/{fileId}/auxiliary/{formatTag}/{formatVersion}
?

(the code change would be trivial; will just need to carefully reflect it in the docs and the tests)