[yocto] [layerindex][PATCH] Indicate if layer has YP Compatible certification

[Paul Eggleton]

Hi Amanda,

On Tuesday, 26 September 2017 12:41:32 PM NZDT Amanda Brindle wrote:
> Allow admin to create Yocto Project versions with the version name,
> description, an icon link that represents that version, and a link that
> contains more information about the version.
> 
> Admins who have the "set_yp_compatibility" permission can then
> decide if a layer has Yocto Project compatible certification,
> and if it does, admin can choose which version of Yocto Project
> the layer is compatible with. If a layer is deemed compatible,
> the version's icon will appear next to the layer's name, and
> the icon will redirect to the link with more information.
> 
> Fixes [YOCTO #11452]

I've merged this with a few minor changes:

* Renamed redirect_url to link_url as it seemed a bit more appropriate
* Fixed missing quotes around attribute values in the template
* Added a data migration
* Set a verbose_name for YPCompatibleVersion and 
LayerBranch.yp_compatible_version

(Hope this is OK - normally I would have asked for a v2, but we're approaching 
the deadline for M4).

Thanks,
Paul

-- 

Paul Eggleton
Intel Open Source Technology Centre