Added expectations checking for state existence
Added expectations checking for state existence

- spec/controllers/cases_controller_spec.rb - Added two expectations
  to make sure that the state & categories variables are provided
  in case there's an error

Updates #1611

EBWiki/EBWiki,EBWiki/EBWiki,BOWiki/BOW,EBWiki/EBWiki,BOWiki/BOW,EBWiki/EBWiki,BOWiki/BOW