[sudoer] Enable read-only commands for all users

[taoyl-ms]

- What I did
Normal user can now execute following commands without sudo:

/usr/bin/decode-syseeprom
/usr/bin/docker images *
/usr/bin/docker exec -it snmp cat /etc/snmp/snmpd.conf
/usr/bin/docker exec -it bgp cat /etc/quagga/bgpd.conf
/usr/bin/docker ps
/usr/bin/generate_dump
/usr/bin/lldpctl
/usr/bin/lldpshow
/usr/bin/sensors
/usr/bin/sfputil show *
/usr/bin/vtysh -c show *
/bin/cat /var/log/syslog
/usr/bin/tail -f /var/log/syslog

[lguohan]

how do you verify this?