Small cleanups for fundamentals classroom

Some of the fundamentals classes I've attended/taught were based on the 3.3.0 training VM instead of the 3.2.3 VM they should have been.  When using the newest VM, every puppet apply run emitted a warning about setting the package "allow_virtual" default explicitly in a future release.  Since the students don't need to worry about that, this code will turn off the deprecation warning.

Also specify license.key mode at time of creation.  Otherwise, it takes a second puppet run to chmod it.  I assume it was picking up the desired perms from the perms on the source file.