fixup! fixup! ci: do not re-run tests on master, use nightly instead

Oh well, this is nightmare to debug.
24 jobs for <span class="ref-name">ci_nightly</span> in 12 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Build
canceled #159697
docker linux amd64
build:clang:linux:amd64

00:00:12

canceled #159696
docker linux amd64
build:linux:amd64

00:00:12

canceled #159698
docker linux amd64 allowed to fail
srpm

00:00:12

 
  Test
canceled #159705
docker linux amd64
deckard:linux:amd64

canceled #159712
privileged
distro:epel-7

canceled #159711
privileged
distro:fedora-27

canceled #159704
docker
doc

canceled #159703
docker linux amd64
installcheck:linux:amd64

canceled #159706
docker linux amd64
installcheck:valgrind:linux:amd64

canceled #159700
docker
lint:c

canceled #159701
docker allowed to fail
lint:clang-scan-build

canceled #159699
docker
lint:lua

canceled #159709
docker linux amd64
respdiff:iter:tcp:linux:amd64

canceled #159710
docker linux amd64
respdiff:iter:tls:linux:amd64

canceled #159708
docker linux amd64
respdiff:iter:udp:linux:amd64

canceled #159702
docker linux amd64
test:linux:amd64

canceled #159707
docker linux amd64
test:linux:amd64:valgrind

 
  Respdiff
canceled #159713
respdiff
respdiff:fwd-tls6-kresd.udp6

canceled #159714
respdiff
respdiff:fwd-udp6-kresd.udp6

canceled #159718
respdiff
respdiff:fwd-udp6-unbound.tcp6

canceled #159719
respdiff
respdiff:fwd-udp6-unbound.tls6

canceled #159717
respdiff
respdiff:fwd-udp6-unbound.udp6

canceled #159716
respdiff allowed to fail
respdiff:iter.tls6

canceled #159715
respdiff
respdiff:iter.udp6