Merge branch '331-upgrade-code-to-tensorflow-v2' into 'develop'

HPC_setup/create_runscripts_HPC.sh

HPC_setup/mlt_modules_hdfml.sh

HPC_setup/mlt_modules_juwels.sh

HPC_setup/requirements_HDFML_additionals.txt

HPC_setup/requirements_JUWELS_additionals.txt

HPC_setup/setup_venv_hdfml.sh

HPC_setup/setup_venv_juwels.sh

README.md

mlair/data_handler/iterator.py

mlair/helpers/__init__.py

mlair/helpers/helpers.py

mlair/keras_legacy/conv_utils.py

mlair/keras_legacy/interfaces.py

mlair/model_modules/abstract_model_class.py

mlair/model_modules/advanced_paddings.py

mlair/model_modules/convolutional_networks.py

mlair/model_modules/flatten.py

mlair/model_modules/fully_connected_networks.py

mlair/model_modules/inception_model.py

mlair/model_modules/keras_extensions.py