adding testing detection function fix

[wilkb777]

Pull request

Fixes #95 . Check issue for full description of what caused the bug and why the testing for this bug is sufficient.

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• Was code modified? Briefly describe. yes, resolves the bug noted above
• Was documentation modified? Briefly describe. No
• Is this a bug-fix? Briefly describe. yes, resolves the bug noted above
• Is this a feature addition? Briefly describe. no
• Did you modify QuaC-Watch config file? If so, did you modify multiqc template no
  configs/multiqc_config_template.jinja2 and script src/quac_watch/create_mutliqc_configs.py as necessary?
• Did you perform system-level testing manually, using ----cli_cluster_config and --snakemake_cluster_config
  options, as described in the documentation? Did it pass
  completely? If not why? no, I individually tested the fix for the function identified in Supplying list of files for external FASTQC causes pipeline to fail #95 as that was all that was causing the issue
• Updated Changelog.md file with change logs in recommended format? yes

Anything else reviewer should know?

[ManavalanG]

LGTM :)