Fix: MultiQC HTML visualisation change

[zipho]

MultiQC HTML visualisation not correct as it is in zip format. Liase with IRIDA core team.

[pvanheus]

As per conversation on IRIDA Gitter, IRIDA does not seem to have a good way to display compound datatypes. HTML support was added recently in phac-nml/irida#849.

One option is to convert the output to a web page with https://github.com/zTrix/webpage2html and supply a simple HTML.

[pvanheus]

As noted in this issue phac-nml/irida#1057, the problem comes when Galaxy turns the HTML into a ZIP at download time. If, as the last stage in the workflow, you change the Datatype to txt, then this conversion does not happen. This might be a solution to making the MultiQC output work.