Changed import order

These changes close the lintian warning C0411.

test/OLItest/TestRunner.py

@@ -13,7 +13,6 @@
 #    You should have received a copy of the GNU General Public License
 #    along with this program; if not, write to the Free Software
 #    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
-import offlineimap.virtual_imaplib2 as imaplib
 import unittest
 import logging
 import os
@@ -23,6 +22,7 @@ import shutil
 import subprocess
 import tempfile
 import random
+import offlineimap.virtual_imaplib2 as imaplib
 
 random.seed()