Make lp directory self-contained to run outer_loop exe on this directory

[tbittar]

Currently, we can launch Benders from an lp directory using benders options.json

We expect to have the same behavior with outer_loop, however, it uses an additional input file in the study, which is not in the lp directory (outer_loop.yml)

The lp directory should contain all necessary information to launch the outer loop with outer_loop options.json.

A solution could be to copy outer_loop.yml in the lp directory, but there might be a more clever way ?

[a-zakir]

the yml file can be placed inside the lp dir

[a-zakir]

make sure to do in options.json :
"OUTER_LOOP_OPTION_FILE": "outer_loop.yml"