LPS-44643 Template completed

Hey Brian! I'm back! (:

I found the way to use static classes also in Velocity, so while I implement it, I sent to you the first part of the feature.

Next PR will include only the wiring for support static classes (both for Freemarker, as you pointed to me, and for Velocity), and then final PR will make everything working.

Hope it's small enough this time!

cc @juliocamarero @epgarcia