missing multiqc_plots in dev branch output

[silviamorins]

Hi,

running the dev branch of the pipeline it completes with the following error:

ERROR nextflow.processor.TaskProcessor - Error executing process > 'multiqc (1)'

Caused by:
  Missing output file(s) `multiqc_plots` expected by process `multiqc (1)`

This might have been caused by the export_plots config option being set to true instead of True in multiqc_config.yaml. I changed the t to a capital T and it ran through successfully, so I'll open a PR with this change.

[drpatelh]

I believe this has now been resolved.