minor refac on import statement (and its order)

run.py

src/data_handling/data_generator.py

src/data_handling/data_preparation.py

src/datastore.py

src/join.py

src/model_modules/flatten.py

src/model_modules/inception_model.py

src/model_modules/linear_model.py

src/model_modules/model_class.py

src/plotting/postprocessing_plotting.py

src/plotting/training_monitoring.py

src/run_modules/experiment_setup.py

src/run_modules/model_setup.py

src/run_modules/post_processing.py

src/run_modules/pre_processing.py

src/run_modules/training.py

test/test_data_handling/test_data_distributor.py

test/test_data_handling/test_data_generator.py

test/test_data_handling/test_data_preparation.py

test/test_datastore.py