unbound: disable trust anchor signaling

TA signaling in newer versions of Unbound breaks old tests
which do not contain answers for RFC 8145 queries.
8 jobs for unbound_no_signaling in 1 minute and 6 seconds (queued for 6 seconds)
latest
Status Job ID Name Coverage
  Test
passed #125716
docker linux amd64
test:comparative:kresd

00:00:39

passed #125717
docker linux amd64
test:latest:kresd

00:01:04

passed #125712
docker linux amd64
test:pep8

00:00:20

passed #125713
docker linux amd64
test:pylint

00:00:53

passed #125714
docker linux amd64
test:rplint

00:00:22

passed #125719
docker linux amd64
test:sanity:pdnsrecursor

00:00:36

failed #125718
docker linux amd64
test:sanity:unbound

00:00:34

passed #125715
docker linux amd64
test:unittests

00:00:30

 
Name Stage Failure
failed
test:sanity:unbound Test
Makefile:68: recipe for target 'sets/resolver/iter_hint_lame.out-qmin' failed
make: *** [sets/resolver/iter_hint_lame.out-qmin] Error 1
make: Leaving directory '/builds/knot/deckard'
Uploading artifacts...
tmpdeckard*: found 8 matching files
WARNING: File ignored: tmpdeckardgvuvcfh9/Q7F00000C0035
WARNING: File ignored: tmpdeckardgvuvcfh9/W7F00000C0035
Uploading artifacts to coordinator... ok id=125718 responseStatus=201 Created token=6Ck5t3Fm
ERROR: Job failed: exit code 1