Implement Cites Suspension Confirmations

-> added a cites_suspension_confirmations table
-> added the confirmations to the suspension form
-> reworked the suspension form to share the same partial between global and taxon concept suspensions
-> renamed suspension -> cites suspension in db and models for consistency
-> brought code coverage of the suspensions related model and controllers to 100% to make sure I haven't broken too much
-> removed some apparently redundant code as I was doing that. now praying.