* [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
- Consolidate config.sh and start.sh scripts into one script (start.sh)
- Solve issue #435 - All dockers now run supervisord as their ENTRYPOINT
- All stdout/stderr output from processes managed by supervisord is now sent to syslog instead of their own files
- Supervisord log messages are now also sent to syslog
- Removed unused smartmontools package from docker-platform-monitor
* Remove hard/soft limits for client-output-buffer in redis
Otherwise when we have a lot of updates from orchagent to syncd latter
one can't process queues fast enough and redic-database disconnect both
orchagent and syncd. orchagent and syncd doesn't have logic to deal with
it and just crash
