changes due to renaming workload model to usageprofile model

edu.kit.ipd.descartes.mm.predictionset/META-INF/MANIFEST.MF

....ipd.descartes.mm.predictionset/model/predictionset.ecore

...tes.mm.predictionset/model/predictionset.ecore.oclinecore

...d.descartes.mm.predictionset/model/predictionset.genmodel

...edu/kit/ipd/descartes/mm/predictionset/PredictionSet.java

.../ipd/descartes/mm/predictionset/PredictionSetPackage.java

...pd/descartes/mm/predictionset/impl/PredictionSetImpl.java

...artes/mm/predictionset/impl/PredictionSetPackageImpl.java

...scartes/mm/predictionset/util/PredictionSetValidator.java