Support for overwriting configurations in PyExperimenter

[fmohr]

Description

it should be possible to pass an (optional) configuration object to the constructor of the PyExperimenter that will be used to overwrite entries from the config file that is being read. This is very useful if you work with several tables but only want to use one configuration file (that works as a kind of template with properties that are common among all the tables).

[tornede]

Have you tried to use the constructor of PyExperimenter, i.e., provide a table_name? This will override the table_name of the configuration file, as you can also see in the documentation:
https://github.com/tornede/py_experimenter/blob/develop/py_experimenter/experimenter.py