remove unneeded Relation#all from IssueTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12710 e93f8b46-1217-0410-a6f0-8f06a7374b81
remove unneeded Relation#all from IssueStatusTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12711 e93f8b46-1217-0410-a6f0-8f06a7374b81
remove unneeded Relation#all from PrincipalTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12712 e93f8b46-1217-0410-a6f0-8f06a7374b81
remove unneeded Relation#all from ProjectTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12713 e93f8b46-1217-0410-a6f0-8f06a7374b81
remove unneeded Relation#all from UserTest

git-svn-id: http://svn.redmine.org/redmine/trunk@12714 e93f8b46-1217-0410-a6f0-8f06a7374b81