Add problem_file launch argument to problem_expert_launch.py

[robodrome]

• Add extra launch argument to problem_expert_launch.py named problem_file.
• Changed plansys2_bringup_launch_distributed.py to be able to handle the new argument.
• Renamed domain_expert_cmd in problem_expert_launch.py, possibly the result of a copy-paste action.

Now PlanSys2 can be started with domain.pddl and problem.pddl and solve the plane right away. You still need to start (or run) the plan.

NOTE: this will be a (small) breaking change.

[robodrome]

done

[fmrico]

@robodrome CI is failing here

[robodrome]

• i used double quotes. changed it to single
• and added newline to launch file

[fmrico]

Still failing @robodrome

[robodrome]

Still failing @robodrome

Yes i see. I am trying to figure out what is going on. I don't have much experience with CI in github, but I think flask8 is giving errors due to white space formatting errors. I look at the failure messages and tried to fix it. I will keep trying.

[fmrico]

Do the tests fail for you locally in your machine?

[robodrome]

Do the tests fail for you locally in your machine?

I haven't tried. I just copied the contents. The code runs fine however. There is one failure left, i removed a trailing whitespace so we'll see if that fixed it. i will run the tests locally next time.

BTW, I see there has been some discussion about pre-commit: #248 (comment)

[robodrome]

i am going to try this again later with a separate branch