deckard: throw an error if a resolver exits or hangs during initialization

10 jobs from kresd-exits in 1 minute and 44 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Test
passed #205868
docker linux amd64
test:augeas

00:00:33

passed #205874
docker linux amd64
test:comparative:kresd

00:01:31

passed #205869
docker linux amd64
test:flake8

00:00:24

passed #205875
docker linux amd64
test:latest:kresd

00:01:19

passed #205870
docker linux amd64
test:mypy

00:00:30

passed #205871
docker linux amd64
test:pylint

00:00:29

passed #205872
docker linux amd64
test:rplint

00:00:24

passed #205877
docker linux amd64
test:sanity:pdnsrecursor

00:00:34

passed #205876
docker linux amd64
test:sanity:unbound

00:00:27

passed #205873
docker linux amd64
test:unittests

00:00:29