A few tweaks to validate storetype and tests.

This adds a few barebone tests just to make sure the parameter passing
works and doesn't blow up.  If you want to extend them further I'd love
it, I'd focus purely on the spec/acceptance/ tests, we've found those to
be more valuable than unit testing for types and providers (as it's much
easier to just validate a jceks file via a command than by a unit test).

If you merge this I'll merge your PR either if you don't have time to
add any more acceptance tests!