Added 1 sec to isalive, since on slow network, this can address some issues

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/trunk@2247 b32b6428-25c9-4566-ad07-03861ab6144f

apps/tools/xaal/tools/isalive.py

@@ -55,7 +55,7 @@ class Scanner:
         t0 = time.time()
         while 1:
             self.eng.loop()
-            if time.time() > (t0 + 2):
+            if time.time() > (t0 + 3):
                 break
 
     def parse_answer(self,msg):