Add expanded acceptance tests for Users, Topics, Roles, and Schemas

[andrewstucki]

This is the alternative to #1127 in which we use expanded, duplicated feature definitions rather than the variant tags.

[RafalKorepta]

Should this PR include the variant and injectVariant tags in harpoon?

[andrewstucki]

I'll drop the variant stuff if we want to go this direction, just let me know what we'd prefer (I kind of prefer variant as it makes it so we don't have to dup the features, but it's also a bit "magic"). The plan is to either merge this or #1127, and then close the other.

[chrisseto]

Of the two, I like the explicitness of this one a touch a more but not having to duplicate all the tests is pretty sweet.

Both LGTM, @andrewstucki take your pick or @RafalKorepta you can be our tie breaker :D

[andrewstucki]

Closing in favor of #1127