oAuth 0.2.2 breaks WOPI connection to ownCloud

[tomneedham]

With OAuth 0.2.2 we added stricter checking of the validity of the oauth token. This now breaks when collabora sends over the access token to ownCloud as a bearer header, because ownCloud thinks you are trying to make an oAuth request.

Collabora should not send the bearer token to owncloud, but only as a URL param.