[MIG] document_url to v10

[Bilbonet]

It's the same code as in pr #111 but with minimal changes to pass travis LITH_CHECK

[oca-clabot]

Hey @Bilbonet, thank you for your Pull Request.

It looks like some users haven't signed our Contributor License Agreement, yet.
You can read and sign our full Contributor License Agreement here: http://odoo-community.org/page/website.cla
Here is a list of the users:

• @Bilbonet (login unknown in OCA database)

Appreciation of efforts,
OCA CLAbot

[pedrobaeza]

You should preserve commit history and add your changes on top of them, and please sign CLA.

[Bilbonet]

Sorry I don't know how to do that working with various repositories (OCA and ingenieriacloud).
Maybe the next time.
I'll look over 'sign CLA' is unknown it for me too.
Thanks.

[pedrobaeza]

That's git knowledge, adding remotes and cherry-picking commits. No possible to merge this if you don't do things properly. Or do you want other steal your work and say it's theirs? It's what you are doing not putting previous commits here.