Fix #714 - Switch to (mainly) sslyze for TLS testing #1552

Job	Run time
build-docker (internet.nl, docker/Dockerfile, app)	44s
build-docker (unbound, docker/Dockerfile, unbound)	41s
build-docker (linttest, docker/Dockerfile, linttest)	2m 39s
build-docker (test-runner, docker/test-runner.Dockerfile)	36s
build-docker (webserver, docker/webserver.Dockerfile)	36s
build-docker (grafana, docker/grafana.Dockerfile)	46s
build-docker (util, docker/util.Dockerfile)	51s
integration-test	3m 29s
docs	1s
development-environment-test	2m 28s
batch-integration-test	3m 10s
lint/check	1m 0s
test	2m 38s
	19m 39s

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