Update ticket. (parte do Issue #93)
refactoring Ticket.update()
Removed Ticket.update(). The corresponding code is in the view: update_ticket.
Merge branch 'master' of git://github.com/scieloorg/balaio into 93_ticket_update
Fixes test name
Insert fields author and title in Ticket, and nullable=False
Insert field author, and nullable=False
Merge branch 'master' of git://github.com/scieloorg/balaio into 93_ticket_update
Incorporação do PR #123
Merge branch 'master' of github.com:scieloorg/balaio