Merge branch 'master' into issue-259

...hmarks/uc3/hazelcastjet/uc3specifics/StatsKeyFactory.java

...astjet/src/main/resources/META-INF/application.properties

...eodolite/benchmarks/uc3/hazelcastjet/Uc3PipelineTest.java

...ks/theodolite/benchmarks/uc4/beam/flink/Uc4BeamFlink.java

...ks/theodolite/benchmarks/uc4/beam/samza/Uc4BeamSamza.java

...rocks/theodolite/benchmarks/uc4/beam/PipelineFactory.java

theodolite-benchmarks/uc4-flink/build.gradle

...marks/uc4-hazelcastjet/.settings/org.eclipse.jdt.ui.prefs

...hazelcastjet/.settings/qa.eclipse.plugin.checkstyle.prefs

...ks/uc4-hazelcastjet/.settings/qa.eclipse.plugin.pmd.prefs

theodolite-benchmarks/uc4-hazelcastjet/Dockerfile

theodolite-benchmarks/uc4-hazelcastjet/build.gradle

...heodolite/benchmarks/uc4/hazelcastjet/HistoryService.java

...e/benchmarks/uc4/hazelcastjet/Uc4HazelcastJetFactory.java

...olite/benchmarks/uc4/hazelcastjet/Uc4PipelineBuilder.java

.../uc4specifics/AggregatedActivePowerRecordAccumulator.java

...c4/hazelcastjet/uc4specifics/ChildParentsTransformer.java

...arks/uc4/hazelcastjet/uc4specifics/EventDeserializer.java

...hmarks/uc4/hazelcastjet/uc4specifics/HashMapSupplier.java

...et/uc4specifics/ImmutableSensorRegistryUc4Serializer.java