Update the path for 2015.2
Update the path for 2015.2

This is **not** backwards compatible, but I don't know a real clean way
to make it so without completely reworking this. There's not a simple
way of getting the master's reportdir anymore.

puppetlabs/pltraining-classroom,dylanratcliffe/pltraining-classroom,samuelson/pltraining-classroom,joshsamuelson/pltraining-classroom,samuelson/pltraining-classroom,puppetlabs/pltraining-classroom,binford2k/pltraining-classroom,joshsamuelson/pltraining-classroom,samuelson/pltraining-classroom,carthik/pltraining-classroom,binford2k/pltraining-classroom,fnaard/pltraining-classroom,carthik/pltraining-classroom,carthik/pltraining-classroom,dylanratcliffe/pltraining-classroom,fnaard/pltraining-classroom,joshsamuelson/pltraining-classroom,binford2k/pltraining-classroom,dylanratcliffe/pltraining-classroom,fnaard/pltraining-classroom,puppetlabs/pltraining-classroom