[dw-free] renaming to a purged account gives errors

[fu]

[commit: http://hg.dwscoalition.org/dw-free/rev/406739fa9fad]

http://bugs.dwscoalition.org/show_bug.cgi?id=4216

Don't log rename event if user is expunged: we don't need that data, and
it'll cause an error. Also fix up a few more places where expunged users in
the rename workflow will cause errors, because we can't get the data (user
is cluster 0). Tweak rename test to behave like actual expunge (besides
statusvis, set cluster to 0).

Patch by fu.

Files modified:

• cgi-bin/DW/Controller/Rename.pm
• cgi-bin/DW/RenameToken.pm
• cgi-bin/DW/User/Rename.pm
• t/rename.t
• views/admin/rename_edit.tt

( Diff: 5 files changed. )