Changing options of an active player / dynamically update ajax.contentUserDataUrl

[NamesMT]

I encounter a breaking bug when trying to use h5p-standalone for an internal training platform.

The platform uses a client-stored, short-lived accessToken that is periodically refreshed on the client, and included in a query param for ajax.contentUserDataUrl.

On longer contents, ajax.contentUserDataUrl could not be updated to include the new token and thus the content no longer saves properly.

[NamesMT]

We can maybe support function type for ajax.contentUserDataUrl, that would solve the case quickly without complicated support for dynamic options update.