Improved config and import behaviour.
This MR has 3 changes:
- It now allows the usage of a custom config filepath with the
- when import is launched, it lists files in both
obm_output_pathname. With this the config file must not be changed between commands.
- I included a new parameter in the config file to distinguish parallelization while processing and while importing. This is important because too many parallel processes during the SQL imports result in connection errors.