Merge branch 'upgrade-beam' into upgrade-flink

.gitlab-ci.yml

docs/theodolite-benchmarks/load-generator.md

theodolite-benchmarks/docker-test/README.md

theodolite-benchmarks/docker-test/smoketest-runner-all.sh

theodolite-benchmarks/docker-test/smoketest-runner.sh

...-benchmarks/docker-test/uc1-beam-flink/docker-compose.yml

theodolite-benchmarks/docker-test/uc1-beam-flink/test.sh

...-benchmarks/docker-test/uc1-beam-samza/docker-compose.yml

theodolite-benchmarks/docker-test/uc1-beam-samza/test.sh

...olite-benchmarks/docker-test/uc1-flink/docker-compose.yml

theodolite-benchmarks/docker-test/uc1-flink/test.sh

...te-benchmarks/docker-test/uc1-kstreams/docker-compose.yml

theodolite-benchmarks/docker-test/uc1-kstreams/test.sh

...-benchmarks/docker-test/uc2-beam-flink/docker-compose.yml

theodolite-benchmarks/docker-test/uc2-beam-flink/test.sh

...-benchmarks/docker-test/uc2-beam-samza/docker-compose.yml

theodolite-benchmarks/docker-test/uc2-beam-samza/test.sh

...olite-benchmarks/docker-test/uc2-flink/docker-compose.yml

theodolite-benchmarks/docker-test/uc2-flink/test.sh

...te-benchmarks/docker-test/uc2-kstreams/docker-compose.yml