Consolidate common SONiC Python-language functionality into one shared package (sonic-py-common) and eliminate duplicate code.
The package currently includes four modules:
- daemon_base
- device_info
- logger
- task_base
NOTE: This is a combination of all changes from https://github.com/Azure/sonic-buildimage/pull/5003, https://github.com/Azure/sonic-buildimage/pull/5049 and some changes from https://github.com/Azure/sonic-buildimage/pull/5043 backported to align with the 201911 branch. As part of the 201911 port, I am not installing the Python 3 package in the base image or in the VS container, because we do not have pip3 installed, and we do not intend to migrate to Python 3 in 201911.
* [cfggen] Support reading from and writing to configdb
* [bgp] Move bgp_admin_state to configdb, support dynamic admin state change
* [sonic-utilities] Adapt configDB for admin status, support config save and config load
* [docker-config-engine]: introduce docker sonic config engine
sonic config engine provide the sonic configure engine for all sonic
dockers that rely on the engine to generate runtime configuration.
