Bug 1184947 : Chinese names of files when exporting

The only issue found when looking into this bug
is the directory name reported is not set.
it was using the variable $todir but the actual
directory name is in the variable $to.

On the Chinese character issue: this is server side:
When creating a leap2a export - the file name gets
appended with an id.  This is expected behaviour as
without this id before the file name, the leap 2a cannot
be re-imported.

So the 0-測試.txt is expected working.

The garbling of Chinese names is not to do with the
import/export, but the language locale support on the
server itself.

behatnotneeded

Change-Id: I6184bd4857cc28545b10ada94a258ae86f808b8e
(cherry picked from commit 39bf1159)