Enable test framework agnoticism.
Merge pull request #1926 from rwjblue/start-making-way-for-test-agnoticism

Enable test framework agnoticism.
Add test for Blueprint.prototype.lookup's ignoreMissing option.
Merge pull request #1927 from rwjblue/add-test-for-ignoreMissing

Add test for Blueprint.prototype.lookup's ignoreMissing option.
Remove manual `env === 'production'` checks.

We already have a `enabled` flag for each, why not use it?

Also, folks may need to minify other environemnts.
Merge pull request #1929 from rwjblue/remove-manual-production-checks

Remove manual `env === 'production'` checks.