#719 Clean error if input config file contains a setting file without an assembling file or contains an assembling file without a settting file

… an assembling file or contains an assembling file without a settting file

Checklist before requesting a review

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[x] unit tests and non regression tests were added (update of inputs, outputs, SA, algos)
[ ] main documentation was updated (update of input/output file)
[x] the corresponding milestone was added in the ticket and in this PR

dynawo / dynaflow-launcher