481efa95f6 is wrong to assume the local nametrans is set up and working.
Now, we correctly check that the local folder name is the same once both
nametrans are applied to itself. This check is only done when we have to create
the folder on remote.
Github-ref: https://github.com/OfflineIMAP/offlineimap/issues/413
Signed-off-by: Nicolas Sebrecht <nicolas.s-dev@laposte.net>