Merge branch 'master' into upgrade-beam

...s/docker-test/uc4-flink-docker-compose/docker-compose.yml

...ocker-test/uc4-kstreams-docker-compose/docker-compose.yml

theodolite-benchmarks/load-generator-commons/build.gradle

...odolite/commons/workloadgeneration/ConfigurationKeys.java

...eodolite/commons/workloadgeneration/HttpRecordSender.java

...odolite/commons/workloadgeneration/KafkaRecordSender.java

.../theodolite/commons/workloadgeneration/LoadGenerator.java

...olite/commons/workloadgeneration/LoadGeneratorTarget.java

...lite/commons/workloadgeneration/TitanRecordGenerator.java

...lite/commons/workloadgeneration/HttpRecordSenderTest.java

...a/theodolite/commons/workloadgeneration/KeySpaceTest.java

...e/commons/workloadgeneration/LoadGeneratorTargetTest.java

.../commons/workloadgeneration/TitanRecordGeneratorTest.java

theodolite/build.gradle