Accept only-one-sample per project as input to QuaC

QuaC fails when only one sample in input ped file (#34 (closed)). This MR fixes this issue by removing filepath globbing. This MR further adds a system-level testing to capture such errors in future (#35 (closed)).

requested review from @bwilk777

deleted the qc_under_one_umbrella branch. This merge request now targets the master branch

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• e29e0f12 - updates changelog

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marked this merge request as ready

@manag looks good! I appreciate the system tests as well! Worked like a charm!

mentioned in commit fdbbd797

merged