Fix issues reported by Coverity #2287

Job	Run time
build-and-push-dps-images (dps-cloud-server, Release, docker/apps/Dockerfile.dps-cloud-server) / build-and-push-image	12m 1s
build-and-push-dps-images (dps-cloud-server-debug, Debug, -DOC_DEBUG_ENABLED=ON -DOC_LOG_MAXIMUM_... / build-and-push-image	9m 36s
build-and-push-images (cloud-server-debug, Debug, docker/apps/Dockerfile.cloud-server-debug) / build-and-push-image	10m 8s
build-and-push-images (cloud-server, Release, docker/apps/Dockerfile.cloud-server) / build-and-push-image	12m 8s
build-and-push-images (cloud-server-discovery-resource-observable, Release, -DOC_DISCOVERY_RESOUR... / build-and-push-image	11m 51s
build-and-push-images (cloud-server-discovery-resource-observable-debug, Debug, -DOC_DISCOVERY_RE... / build-and-push-image	9m 34s
	1h 5m 18s

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