add journal after creating/deleting issue relation (#1005)

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11885 e93f8b46-1217-0410-a6f0-8f06a7374b81
remove "del" tag from deleted issue relation (#1005)

It is confused with deleted issue.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11886 e93f8b46-1217-0410-a6f0-8f06a7374b81