Update to beat.backend.python 1.5.x

beat/core/algorithm.py

beat/core/data.py

beat/core/data_loaders.py

beat/core/database.py

beat/core/dataformat.py

beat/core/dbexecution.py

beat/core/dock.py

beat/core/execution/base.py

beat/core/execution/docker.py

beat/core/execution/local.py

beat/core/execution/remote.py

beat/core/execution/subprocess.py

beat/core/experiment.py

beat/core/hash.py

beat/core/inputs.py

beat/core/library.py

beat/core/message_handler.py

beat/core/outputs.py

beat/core/plotter.py

beat/core/schema/execution/1.json