Simplifie kaiju db parameter
Kaiju db use 3 parameters :
kaiju_db = "/work/bank/kaijudb/kaijudb_Juin2019/refseq/kaiju_db_refseq.fmi"
kaiju_nodes = "/work/bank/kaijudb/kaijudb_Juin2019/nodes.dmp"
kaiju_names = "/work/bank/kaijudb/kaijudb_Juin2019/names.dmp"
Could use only one path and generate the 3 values automatically in pipeline thanks to a parameter 'kaiju_db_dir':
val index_kaiju_nodes_final_ch
val index_kaiju_db_final_ch
val index_kaiju_names_final_ch