Fix module import

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@1942 b32b6428-25c9-4566-ad07-03861ab6144f

apps/dashboard/xaal/dashboard/core/sio.py

 import socketio
 from . import xaal_core
-#import xaal_core
 
 socket = socketio.Server(async_mode='gevent',ping_interval=0.5)