Fixed tests and reverted _label change

.gitignore

.vscode/launch.json

...a/de/monticore/lang/monticar/emadl/generator/Backend.java

...nticore/lang/monticar/emadl/generator/EMADLGenerator.java

...core/lang/monticar/emadl/generator/EMADLGeneratorCli.java

.../monticar/emadl/generator/RewardFunctionCppGenerator.java

...java/de/monticore/lang/monticar/emadl/GenerationTest.java

.../monticore/lang/monticar/emadl/IntegrationCaffe2Test.java

...e/monticore/lang/monticar/emadl/IntegrationMXNetTest.java

...target_code/gluon/CNNCreator_mnist_mnistClassifier_net.py

...get_code/gluon/CNNDataLoader_mnist_mnistClassifier_net.py

...ces/target_code/gluon/CNNNet_mnist_mnistClassifier_net.py

...arget_code/gluon/CNNPredictor_mnist_mnistClassifier_net.h

...e/gluon/CNNSupervisedTrainer_mnist_mnistClassifier_net.py

...target_code/gluon/CNNTrainer_mnist_mnistClassifier_net.py

src/test/resources/training_data/test.h5

src/test/resources/training_data/train.h5