Rails4: replace deprecated find_all_by_* at IssuesControllerTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12627 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace deprecated find_all_by_* at IssuesCustomFieldsVisibilityTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12628 e93f8b46-1217-0410-a6f0-8f06a7374b81