change timeout to 30 seconds

When AccountHistoryPage uses Async to load details of each transaction,
sometimes the server needs ~15 seconds to send response

modules/lcl/browser.py

@@ -55,6 +55,8 @@ class LCLBrowser(LoginBrowser):
     skip = URL('/outil/UAUT/Contrat/selectionnerContrat.*',
                '/index.html')
 
+    TIMEOUT = 30.0
+
     def deinit(self):
         pass