docker experiment runs not tested properly.

There are several issues when you run the experiments with the docker executor:

• db.examples docker image is not publicly available
• indexing of databases (view.index method) runs outside docker (different root_folder compared to inside docker containers) and this leads to broken paths when .get of views is called inside docker.
• logging leads to stat errors:

% beat experiment run --docker jmcgrat3/jmcgrat3/livdet-baseline/1/livdet-baseline
Index for database livdet-iris-2020/1 not found, building it
Registered 'LivDet2020 (1.0.0)' -> 'livdet2020:latest'
Untagged image, skipping
Registered 'Python (2.1.0)' -> 'beatenv/beat.env.python:2.1.0r7'
Registered 'Python (1.0.0)' -> 'beatenv/beat.env.python:latest'
Registered 'OpenCV (1.0.0)' -> 'opencv:latest'
Registered 'C++ (2.0.0)' -> 'beatenv/beat.env.cxx:2.0.0r3'
Running `jmcgrat3/BSIF-Feature-Extraction/1' for block `s17b12'
Start the execution of 'jmcgrat3/BSIF-Feature-Extraction/1'
Traceback (most recent call last):
  File "/Users/josephmcgrath/miniconda3/envs/beat/bin/beat", line 11, in <module>
    sys.exit(main())
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/click/core.py", line 829, in __call__
    return self.main(*args, **kwargs)
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/click/core.py", line 782, in main
    rv = self.invoke(ctx)
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/click/core.py", line 1259, in invoke
    return _process_result(sub_ctx.command.invoke(sub_ctx))
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/click/core.py", line 1066, in invoke
    return ctx.invoke(self.callback, **ctx.params)
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/click/core.py", line 610, in invoke
    return callback(*args, **kwargs)
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/click/decorators.py", line 21, in new_func
    return f(get_current_context(), *args, **kwargs)
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/beat/cmdline/decorators.py", line 94, in _decorator
    value = view_func(*args, **kwargs)
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/beat/cmdline/experiments.py", line 782, in run
    return run_experiment(config, name, force, docker, local, environment, quiet)
  File "/Users/josephmcgrath/miniconda3/envs/beat/lib/python3.7/site-packages/beat/cmdline/experiments.py", line 312, in run_experiment
    simplify_time(data_stats["time"]["read"]),
KeyError: 'time'