Rails4: replace deprecated Relation#first with finder options at ApiTest::AttachmentsTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12595 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace deprecated Relation#first with finder options at ApiTest::IssueCategoriesTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12596 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace deprecated Relation#first with finder options at ApiTest::IssueRelationsTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12597 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace deprecated Relation#first with finder options at ApiTest::IssuesTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12598 e93f8b46-1217-0410-a6f0-8f06a7374b81
Rails4: replace deprecated Relation#first with finder options at integration IssuesTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12599 e93f8b46-1217-0410-a6f0-8f06a7374b81