Dreamview plus fails to display traffic light status

[YuqiHuai]

Describe the bug
Apollo's Dreamview Plus fails to display traffic light status (e.g., green, yellow, red).

To Reproduce
Steps to reproduce the behavior:

1. Start the dev container bash docker/scripts/dev_start.sh
2. Enter the dev container bash docker/scripts/dev_into.sh
3. Start Dreamview plus bash scripts/bootstrap.sh start_plus
4. Start manual traffic light control bash scripts/manual_light.sh
5. Go to http://localhost:8888
6. Choose Mode->PnC and Operations->Sim_Control
7. Go to Route Editing and set Initial Point near a junction with traffic light.
8. Refer to the screenshot below and verify that the traffic light status (red lights) is not being displayed.

Expected behavior
Traffic light in Dreamview Plus should display correct traffic light status.

Screenshots

Image	Zoomed In

This screenshot is obtained from map Borregas Avenue.

Additional context
Bug is reproduced on commit d53aa3d.