lib/oelite: Fix SVN fetcher bug

When swithing between revisions, the pysvn client object (at least in some
versions) seems to remember the old revision.  So even though we remove
the checkout completely, the client.checkout() would fail.

Signed-off-by: Esben Haabendal <esben@haabendal.dk>
lib/oelite: Whitespace cleanup

Signed-off-by: Esben Haabendal <esben@haabendal.dk>