Merge master

...uc1-workload-generator/.settings/org.eclipse.jdt.ui.prefs

...ad-generator/.settings/qa.eclipse.plugin.checkstyle.prefs

...-workload-generator/.settings/qa.eclipse.plugin.pmd.prefs

benchmarks/uc1-workload-generator/Dockerfile

benchmarks/uc1-workload-generator/build.gradle

.../java/theodolite/uc1/workloadgenerator/LoadGenerator.java

...hmarks/uc2-application/.settings/org.eclipse.jdt.ui.prefs

...-application/.settings/qa.eclipse.plugin.checkstyle.prefs

...rks/uc2-application/.settings/qa.eclipse.plugin.pmd.prefs

benchmarks/uc2-application/Dockerfile

benchmarks/uc2-application/README.md

benchmarks/uc2-application/build.gradle

...n/java/theodolite/uc2/application/AggregationService.java

...odolite/uc2/streamprocessing/ChildParentsTransformer.java

...uc2/streamprocessing/ChildParentsTransformerSupplier.java

...theodolite/uc2/streamprocessing/JointFlatTransformer.java

...te/uc2/streamprocessing/JointFlatTransformerSupplier.java

...a/theodolite/uc2/streamprocessing/JointRecordParents.java

...theodolite/uc2/streamprocessing/OptionalParentsSerde.java

...in/java/theodolite/uc2/streamprocessing/ParentsSerde.java