**- Why I did it**
- The thermalctld daemon on the Pmon docker requires support from the thermal manager API.
**- How I did it**
- Removed the old function for detecting a faulty fan.
- Removed the old function for detecting excess temperature.
- Implement thermal_manager APIs based on ThermalManagerBase
- Implement thermal_conditions APIs based on ThermalPolicyConditionBase
- Implement thermal_actions APIs based on ThermalPolicyActionBase
- Implement thermal_info APIs based on ThermalPolicyInfoBase
- Add thermal_policy.json
* [device/celestica]: DX010 platform API update (#4608)
- Fix fancontrol.service path
- Fix return temp format in thermal API
- Improve init time in chassis API
- Upgrade sfp API
* [device/celestica]: Update DX010 reboot cause API (#4678)
- Add more cases support in DX010 reboot cause API
- Add Thermal Overload reboot cause support
- Add new Watchdog reboot cause support
* [device/celestica]: using sonic-py-common package
