(#PUP-1046) Add spec test for skeleton for generated modules

This patch adds a simple spec test to ensure that by including the
class with default values for all the parameters, that the class is
contained within the catalog.
Merge pull request #2253 from ghoneycutt/PUP1046_module_generate_skeleton_spec_test

(#PUP-1046) Add spec test for skeleton for generated modules