L2SS-200: File restructuring for Python files

devices/clients/__init__.py

devices/clients/attribute_wrapper.py

devices/clients/comms_client.py

devices/clients/opcua_client.py

devices/common/__init__.py

devices/common/lofar_git.py

devices/common/lofar_logging.py

devices/devices/__init__.py

devices/devices/apsctl.py

devices/devices/device_decorators.py

devices/devices/hardware_device.py

devices/devices/pcc.py

devices/devices/sdp.py

devices/devices/sdp/__init__.py

devices/devices/sdp_statistics/__init__.py

devices/devices/sdp_statistics/sst.py

devices/devices/sdp_statistics/statistics_packet.py

devices/examples/__init__.py

devices/examples/load_from_disk/__init__.py

devices/examples/load_from_disk/ini_client.py