Support testing with multiple backend instances

This is useful for testing backends with different configurations
(different sites, being anonymous or not, etc.)
The previous behavior was to chose a random backend instance.

weboob/applications/pastoob/pastoob.py

@@ -42,12 +42,13 @@ class Pastoob(ReplApplication):
         self.load_config()
         return ReplApplication.main(self, argv)
 
-    def do_get(self, _id):
+    def do_get(self, _id, *args):
         """
         get ID
 
         Get a paste contents.
         """
+        print args
         if not _id:
             print >>sys.stderr, 'This command takes an argument: %s' % self.get_command_help('get', short=True)
             return 1