VOL-4112 Add configuration flag to define the number of UNIs created in BBSim
uni_ports integer parameter added to OltConfig as command line parameter

Change-Id: I10956c497eb2123c62a3f9c27e912cd0046efcb8
diff --git a/configs/bbsim.yaml b/configs/bbsim.yaml
index 6fb4676..5d0dfcb 100644
--- a/configs/bbsim.yaml
+++ b/configs/bbsim.yaml
@@ -34,6 +34,7 @@
   device_serial_number: BBSM00000001
   pon_ports: 1
   nni_ports: 1
+  uni_ports: 4
   onus_per_port: 1
   technology: "XGS-PON"
   id: 0                 # OLT-ID of the device