add BrowserToBeContinued exception and handle it

weboob/exceptions.py

@@ -17,6 +17,7 @@
 # You should have received a copy of the GNU Affero General Public License
 # along with weboob. If not, see <http://www.gnu.org/licenses/>.
 
+from weboob.tools.value import Value
 
 class BrowserIncorrectPassword(Exception):
     pass
@@ -38,6 +39,13 @@ class BrowserUnavailable(Exception):
     pass
 
 
+class BrowserToBeContinued(BrowserUnavailable):
+    def __init__(self, *args):
+        self.fields = []
+        for arg in args:
+            self.fields.append(Value(label=arg))
+
+
 class BrowserHTTPNotFound(BrowserUnavailable):
     pass