Run ansible tests as root on Travis
Run ansible tests as root on Travis

Travis checks out the repo as root and running as another user causes permissions problems.

As this is all happening within a Travis VM we don't care about security implications.
ebmdatalab/openprescribing,annapowellsmith/openpresc,ebmdatalab/openprescribing,annapowellsmith/openpresc,ebmdatalab/openprescribing,annapowellsmith/openpresc,annapowellsmith/openpresc,ebmdatalab/openprescribing