Failed conversions due to no 'Location' header

[Tony Butler]

We’ve had a lot of failed doc conversions recently, and they all return the error "The Microsoft Graph conversion API did not send a URL to the converted document". On debugging, this turns out to be caused by the converter plugin looking for the URL of the converted document in the 'Location' header of the MS API response, and failing to find it when the header is called 'location', which for some reason appears to be the case now (for us at least).

PR with simple fix at: https://bitbucket.org/uonmoodle/moodle-fileconverter_onedrive/pull-requests/12

[Neill Magill]

Thanks for the pull request, it has been merged into the main code base now.

[Tony Butler]

Thanks Neill