1. Modify snmp user to Debian-snmp to fit snmpd 5.7.3 2. Fix a bug that cause sysLocation to be missing from snmpd.conf
Add a sonic-config-engine to help generate config file based on minigraph and other data on runtime. Modify fpm, teamd, lldp, snmp, and platform-monitor docker to use sonic-config-engine to generate config in docker upon load.