[WIP] Fix #714 - Switch to (mainly) sslyze for TLS testing #1467

Job	Run time
build-docker (internet.nl, docker/Dockerfile, app)	5m 17s
build-docker (unbound, docker/Dockerfile, unbound)	36s
build-docker (linttest, docker/Dockerfile, linttest)	5m 44s
build-docker (test-runner, docker/test-runner.Dockerfile)	41s
build-docker (webserver, docker/webserver.Dockerfile)	40s
build-docker (grafana, docker/grafana.Dockerfile)	27s
build-docker (cron, docker/cron.Dockerfile)	30s
docs	1s
development-environment-test	2m 21s
integration-test	3m 16s
batch-integration-test	2m 47s
lint/check	43s
test	2m 24s
	25m 27s

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