Merge "Decode nova-manage args into unicode."

bin/nova-manage

@@ -2373,6 +2373,10 @@ def main():
     for k, v in fn_kwargs.items():
         if v is None:
             del fn_kwargs[k]
+        else:
+            fn_kwargs[k] = v.decode('utf-8')
+
+    fn_args = [arg.decode('utf-8') for arg in fn_args]
 
     # call the action with the remaining arguments
     try: