remove unneeded Relation#all from IssuesControllerTest#test_bulk_copy_to_another_project

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012589
Rails4: replace deprecated Relation#first with finder options at IssuesControllerTest

--HG--
extra : convert_revision : svn%3Ae93f8b46-1217-0410-a6f0-8f06a7374b81/trunk%4012590