Please, install the plugin.
It should be installed and available now, but it is not ansible'd (yet).
Let us know if there is anything else we can help with.
This can be closed I guess?
It's in fact not quite merged but I feel more and more like keeping the plugin in git in the ansible repo isn't sustainable, it would be good to look for a nicer solution I think.
commit 274d7993ce1ac3a808d8673c8aa07234956118b0 has the new way to manage jenkins' plugins and takes care of this.
Thank you very much for your effort!