pymodulepackage (schueltke): fix for tool_level access

Problem:

• when tool_level in aircraft exchange file is accessed by a module but is not existing, the pymodulepackage throws an error as it can be seen and discussed in weight_and_balance_analysis: aircraft-design!31 (comment 2743760) Solution:
• implement a handling procedure how to continue, when tool_level access failed and set tool_level to 0 in that case

Test:

• test previous version using weight_and_balance_analysis with an aircraft exchange file in a first loop, when tool_level is not yet written in the node masses_cg_inertia and compare it with an execution when the attribute was already written by weight_and_balance_analysis
• test the same procedure with the fix from this MR

changed milestone to %Milestone Airbus

added librarypymodulepackage typebug labels

requested review from @ChrisRuw and @kristina.mazur

assigned to @Florian.Schueltke

enabled an automatic merge when all merge checks for fa90ee2c pass

requested changes

resolved all threads

aborted the automatic merge because the source branch was updated. Learn more.

added 1 commit

• 4452d12d - Apply 1 suggestion(s) to 1 file(s)

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added 3 commits

• 4452d12d...9802ff53 - 2 commits from branch develop
• 65d1500a - Merge branch 'develop' into fix/tool_level_mission

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requested review from @AndiGob

approved this merge request

enabled an automatic merge when all merge checks for 65d1500a pass

bypassed reviews on this merge request

canceled the automatic merge

merged

mentioned in commit e999a694