[api] Skip set_expiry before_filter for states controller.

Ensure that swapping state input/select works in all contexts:

Set the default country to one without associated states so that
the spec verifies that if the selected country changes from without
associated states to one that does have them, we get the required
behaviour (the select is not hidden). Previously the spec only test
switching between two countries with associated states in teh db.

Fixes #3185