[VOL-3054] Added -igmp flag and changed sadis response

Change-Id: I621cd516bd3c5aa20f1095d5200e8f3d4af43da7
diff --git a/configs/bbsim.yaml b/configs/bbsim.yaml
index 8cb5e91..c4ade64 100644
--- a/configs/bbsim.yaml
+++ b/configs/bbsim.yaml
@@ -4,6 +4,7 @@
 
 # BBSim specific settings
 bbsim:
+  enable_igmp: false
   enable_dhcp: false
   enable_auth: false
   openolt_address: ":50060"
@@ -35,7 +36,6 @@
   pon_ports: 1
   nni_ports: 1
   onus_per_port: 1
-  onus_per_port: 1
   technology: "XGS-PON"
   id: 0                 # OLT-ID of the device
   reboot_delay: 10      # reboot delay in seconds