Use puppet-storyboard@master

This change makes sure that the version of puppet-storyboard in use
is always the most recent one. It also removes example42::puppi, as
as of https://review.openstack.org/#/c/114383/ it is no longer
a requirement.

Depends on https://review.openstack.org/#/c/114383/

Change-Id: I7024476a8eea9c1bb61f082782fc1149eda37a6e
Merge "Use puppet-storyboard@master"