Store relation type instead of i18n key in journals (#15704).

git-svn-id: http://svn.redmine.org/redmine/trunk@12416 e93f8b46-1217-0410-a6f0-8f06a7374b81
Removed unused variable.

git-svn-id: http://svn.redmine.org/redmine/trunk@12417 e93f8b46-1217-0410-a6f0-8f06a7374b81