[WIP] Fix #714 - Switch to (mainly) sslyze for TLS testing #1432

Job	Run time
build-docker (internet.nl, docker/Dockerfile, app)	5m 22s
build-docker (unbound, docker/Dockerfile, unbound)	35s
build-docker (linttest, docker/Dockerfile, linttest)	5m 38s
build-docker (test-runner, docker/test-runner.Dockerfile)	40s
build-docker (webserver, docker/webserver.Dockerfile)	40s
build-docker (grafana, docker/grafana.Dockerfile)	28s
build-docker (cron, docker/cron.Dockerfile)	42s
docs	1s
integration-test	3m 6s
batch-integration-test	2m 36s
development-environment-test	2m 29s
lint/check	40s
test	2m 45s
	25m 42s

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