Submit orders to tax cloud even when the taxable rate is 0%.

The previous check against adjustments for tax cloud tax rates does not
work when the tax rate is 0%. An adjustment is not created for 0% rates.
However, US orders should still be submitted to Tax Cloud even when the
rate is 0%.
Clean up a test.

The country can be used instead of adding the individual states.
Screenshot line left in a test accidentally.