Implementation of RequestEntities (ModelStructureQuery)

...rc/tools/descartes/dql/connector/kieker/KiekerHelper.java

...ql/connector/kieker/ModelStructureQueryConnectorImpl.java

...onnector/kieker/PerformanceMetricsQueryConnectorImpl.java

...cartes/dql/connector/kieker/filter/UtilizationFilter.java

...ools/descartes/dql/connector/kieker/structures/Trace.java

...cartes/dql/connector/kieker/structures/cpu/CpuMapKey.java

...tor/kieker/structures/identifier/ComponentIdentifier.java