Rails4: replace deprecated Relation#first with finder options at IssueTest
Rails4: replace deprecated find_all_by_* at Tracker model
Rails4: replace deprecated Relation#update_all at IssueTest
Rails4: replace deprecated Relation#update_all at Repository model
Rails4: replace deprecated find_all_by_* at WikiPageTest
Rails4: replace deprecated Relation#update_all at User model
code format cleanup ChangesetTest
remove unneeded Relation#all from MailHandler#add_watchers
remove unneeded Relation#all from Project#copy_issues
remove unneeded Relation#all from News#latest