Why I did it
Nvidia platform API does not support set LED to orange
How I did it
Allow user to set LED to orange
How to verify it
Added unit test
Manual test
Depends on #9358
Why I did it
Adjust LED logical according to hw-mgmt change.
How I did it
Add a trigger to set LED to blink.
How to verify it
Manual test
- Why I did it
* To support systems with dynamic port configuration
* Apply lazy initialization to faster the speed of loading platform API
- How I did it
* Add module.py to implement dynamic port configuration (aka line card model)
* Adjust chassis.py, platform.py, thermal.py, sfp.py to support dynamic port configuration
* Optimize existing code
- How to verify it
Platform regression on MSN4700, MSN3800 and MSN2700, 100% pass
Unit test covers all new changes.
