Merge pull request #371 from daniel-pittman/feature/master/307-run-acceptance-test-using-packaged-artifacts

Feature #307 - run acceptance test using packaged artifacts
Puppet dislikes top level brace surrounded variables...

Apparently some versions of Puppet dislike `${foo}` at the top level, leading
to test failures with the message "Could not match ${foo}", which is awesome.

This corrects that - the unquoted variable is portable through all the
variants of the DSL, so solves the problem smoothly.

Signed-off-by: Daniel Pittman <daniel@rimspace.net>