Display error for email_confirmations on the signature form
Display error for email_confirmations on the signature form

Errors for ``validates_confirmation_of :email`` used to appear in ``errors[:email]`` but now appear on ``errors[:email_confirmation]`` and we weren't showing those errors.  We now are.

unboxed/e-petitions,StatesOfJersey/e-petitions,telekomatrix/e-petitions,StatesOfJersey/e-petitions,unboxed/e-petitions,ansonK/e-petitions,telekomatrix/e-petitions,ansonK/e-petitions,alphagov/e-petitions,joelanman/e-petitions,StatesOfJersey/e-petitions,oskarpearson/e-petitions,alphagov/e-petitions,oskarpearson/e-petitions,alphagov/e-petitions,joelanman/e-petitions,oskarpearson/e-petitions,alphagov/e-petitions,unboxed/e-petitions,ansonK/e-petitions,telekomatrix/e-petitions,unboxed/e-petitions,StatesOfJersey/e-petitions,joelanman/e-petitions