The MIPs aliquot importer should handle some values as special cases

[Nicklas Nordborg]

Some of the columns in the file used for importing MIPs aliquots sometimes have special values that should be treated differently. This used to be a manual curation process before importing the file to BASE. Manually changing values is error prone so it would be a lot better to do this in the importer instead.

All full list cases is not yet available. Here is what we know so far:

• The NormalTumor columns can have values that should be translated: NA --> null; TUMOR --> T. Other values are kept as is.
• Variant: 0 --> null. Other values are kept as is.
• More...

[Nicklas Nordborg]

In 5757:

References #1206: The MIPs aliquot importer should handle some values as special cases

Implemented the NormalTumor and Variant translations.

[Nicklas Nordborg]

Closing this for now since we need to release the other bugfixes. If there are more special cases a new ticket should be opened.