Update sonic-utilities submodule; Add commands to sudoers as necessary (#608)

Author: jleveque

files/image_config/sudoers/sudoers

@@ -18,7 +18,14 @@ Defaults        env_keep += "VTYSH_PAGER"
 # Cmnd alias specification
 # Note: bcmcmd is dangerous for users in read only netgroups because it may operate ASIC
 Cmnd_Alias      READ_ONLY_CMDS = /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/generate_dump, \
+                                 /usr/bin/lldpctl, \
+                                 /usr/bin/lldpshow, \
+                                 /usr/bin/sensors, \
+                                 /usr/bin/sfputil, \
                                  /usr/bin/vtysh -c show *, \
                                  /bin/cat /var/log/syslog, \
                                  /usr/bin/tail -f /var/log/syslog