Rails4: replace deprecated find_all_by_* at IssuesController

git-svn-id: http://svn.redmine.org/redmine/trunk@12579 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace deprecated Relation#update_all at IssuesController

git-svn-id: http://svn.redmine.org/redmine/trunk@12580 e93f8b46-1217-0410-a6f0-8f06a7374b81