contint: puppet doc now handled by Jenkins

The puppet documentation is now handled by Jenkins. This patch:

* removes the puppet classe misc::docs::puppet which was used to
  generate the documentation on gallium.
* move misc::docsite under the contint module which would thus now
  manage doc.wikimedia.org
* /srv/org/wikimedia/doc now belongs to jenkins:jenkins and group
  writable.

Change-Id: I1a503f65ea15e160ae4b5e1a8110c5bfba37a348
Merge "contint: puppet doc now handled by Jenkins" into production