should-vdj-to-tap.py: mark as failed a test when there is an UNSEG

The only are .should-locus tests.
1 job for 3250-decaler-les-valeurs-ascii-des-k-mers-ambiguous-et-unknown in 4 seconds (queued for 16 minutes and 27 seconds)
Status Job ID Name Coverage
  Test Tools
passed #122826
test_tools

00:00:04