info() -> debug() on unknow device

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/0.7@2889 b32b6428-25c9-4566-ad07-03861ab6144f

core/metadb/xaal/metadb/app.py

@@ -86,7 +86,7 @@ class MetaDB(object):
         dev = self.get_device(_device)
         if dev:
             return {'device':_device,'map' : dev.dict()}
-        logger.info('Unknown device %s' % _device)
+        logger.debug('Unknown device %s' % _device)
         return {'device':_device,'map' : {}}
 
     def get_value(self,_device,_key):