Imitervirales assignment although not well supported by ViPhOGs

[hoelzer]

This issue was discovered during the introduction of the new voting scheme and adjustment of the virus taxonomy: #103

We ran the assembly.fasta test file. In the 08-final/gff/assembly_virify.gff file, we got for pos.phage.5 the following CDS and ViPhOG hits:

pos.phage.5	Prodigal	CDS	1934	3370	.	+	0	ID=pos.phage.5_3;gbkey=CDS;viphog=ViPhOG1981;viphog_taxonomy=Arquatrovirinae
pos.phage.5	Prodigal	CDS	13526	15382	.	+	0	ID=pos.phage.5_19;gbkey=CDS;viphog=ViPhOG9461;viphog_taxonomy=Twortvirinae
pos.phage.5	Prodigal	CDS	15397	18063	.	+	0	ID=pos.phage.5_20;gbkey=CDS;viphog=ViPhOG9903;viphog_taxonomy=Picovirinae
pos.phage.5	Prodigal	CDS	18063	19595	.	+	0	ID=pos.phage.5_21;gbkey=CDS;viphog=ViPhOG9462;viphog_taxonomy=Twortvirinae
pos.phage.5	Prodigal	CDS	22518	23501	.	+	0	ID=pos.phage.5_26;gbkey=CDS;viphog=ViPhOG27646;viphog_taxonomy=Picovirinae
pos.phage.5	Prodigal	CDS	37511	37756	.	+	0	ID=pos.phage.5_54;gbkey=CDS;viphog=ViPhOG9436;viphog_taxonomy=Klosneuvirinae
pos.phage.5	Prodigal	CDS	37765	38172	.	+	0	ID=pos.phage.5_55;gbkey=CDS;viphog=ViPhOG1970;viphog_taxonomy=Sepvirinae
pos.phage.5	Prodigal	CDS	40637	40816	.	+	0	ID=pos.phage.5_62;gbkey=CDS;viphog=ViPhOG4695;viphog_taxonomy=Twortvirinae

but in the final taxonomy assignment in 08-final/taxonomy/high_confidence_viral_contigs_prodigal_annotation_taxonomy.tsv we got

contig_ID	genus	subfamily	family	order	class
pos.phage.5			1	Imitervirales	Megaviricetes

Why do we get based on these ViPhOGs Imitervirales as annotation?

Actually, Klosneuvirinae is a subfamily within Imitervirales but it doesn't make sense that the pipeline classifies it with only one ViPhOG hit.

@guille0387 was looking into that and probably found the reason.