flamapy update and minor fixes

[pabpazjim]

This update changes requirements and imports so the tool stops using famapy and starts using flamapy instead. Some minor fixes to operations were also added as they were causing operations to fail.

However, there are still some issues which should be fixed. This is the current status of operations:

• main_complete_partial_config works fine
• main_find_defective_config works fine.
• main_optimize_config works fine. The command feedback used to diplay jhipster as an available input while it currently isn't, so the feedback message has been updated.

main_reverse_engineering is not working. To reproduce the issue:
python main_reverse_engineering.py -fm models/pizzas.xml
It will return:

By debugging, I have found out that the error is triggered in the class Node in montecarlo_framework/models/search_space.py

where there is an instance of this class being somewhere created, with no action object at all, not even one with a None value.

This seems to be causing the error but I can't figure out why this happens.

[pabpazjim]

@jmhorcas please take a look at this :)