Correctly assign the 'draft' state to tag in test
Correctly assign the 'draft' state to tag in test

As the 'state' attribute is protected, we can only assign it directly.
This previously worked due to 'draft' being the default, but this 
change makes the circumstances more specific.
alphagov/panopticon,alphagov/panopticon,alphagov/panopticon,alphagov/panopticon