fix find_all_by_id(n1, n2) parameter at IssuesCustomFieldsVisibilityTest#test_index_with_partial_custom_field_visibility

find_all_by_id(n1, n2) returns only n1 result.

git-svn-id: http://svn.redmine.org/redmine/trunk@12621 e93f8b46-1217-0410-a6f0-8f06a7374b81