Getting nt BLAST lineage directly from BLAST output

[eeaunin]

Description of feature

In the future we could change the BLAST code so that it wouldn't need the accession2taxid files and the GET_LINEAGE_FOR_TOP module. The accession2taxid files were needed in the past because the nt BLAST database at /data/blastdb/Supported/NT didn't have built-in taxonomy. But when using the v5 databases with built-in taxonomy like this version of ASCC does, it should be possible to get BLAST hit taxid's directly from BLAST's output and circumvent the need for the accession2taxid database files and the https://github.com/sanger-tol/ascc/blob/dp24_btk_datasets/bin/get_lineage_for_top.py script