(TK-105) Fix error with catalog compilation

Fix error with catalog compilation that occurred when using
this module by adding a new feature that checks if the hocon gem
is present, and use that feature to guard the requires that
use files from that gem.
Fix smoke tests

Fix error in smoke tests caused by the presence of a "section"
parameter.
Merge pull request #2 from fpringvaldsen/TK-105-catalog-compilation-failure

(TK-105) Fix catalog compilation failure