Fix and test report generation locking for results views, fixes #1749 #2349

Job	Run time
build-docker (unbound, docker/Dockerfile, unbound)	1m 24s
build-docker (internet.nl, docker/Dockerfile, app)	2m 7s
build-docker (test-runner, docker/test-runner.Dockerfile)	1m 37s
build-docker (util, docker/util.Dockerfile)	1m 30s
build-docker (linttest, docker/Dockerfile, linttest)	2m 52s
build-docker (grafana, docker/grafana.Dockerfile)	1m 38s
build-docker (webserver, docker/webserver.Dockerfile)	1m 17s
test	2m 22s
batch-integration-test	7m 57s
lint/check	45s
integration-test	8m 8s
development-environment-test	2m 36s
docs	5s
	34m 18s

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