The release exporter should sort raw bioassay by external id when the "Use external ID" options is active

[Nicklas Nordborg]

The raw bioassays to export are usually sorted by name in all files. When the "Use external ID" options is active all names are replaced with the external id from the specimen which means that the sort order seems like a "random" sort order. It would be useful to re-sort the rawbioassays in external id order.

It should not bee too hard to fix this, but it is not a simple change in the query used for loading the data either.

To sort the raw bioassays we need to first load the specimen names and external id. For each raw bioassay we can then find the corresponding specimen (by comparing the names) and generate the external id. Onbce we have that for all raw bioassays we can re-sort the list.

[Nicklas Nordborg]

(In [4626]) Fixes #1007: The release exporter should sort raw bioassay by external id when the "Use external ID" options is active