NGSDAnnotateCNV: improve annotation of overlapping pathogenic CNVs

[marc-sturm]

[ ] Check if this query really gives all overlapping pathogenic CNVs from the NGSD:

SELECT rcc.class, cnv.start, cnv.end FROM cnv INNER JOIN report_configuration_cnv rcc ON cnv.id = rcc.cnv_id WHERE rcc.class IN ('4', '5') AND cnv.chr = :0 AND cnv.start <= :1 AND :2 <= cnv.end

[ ] only annotate if overlap in both directions is at least 10% of the CNV