fix ONU ids for multiple olt -bbsim

Change-Id: I64b0c40a979b3356b6534a5deaf98ffa3c43241e
diff --git a/tests/data/bbsim-kind-2OLTx2ONUx2PON.yaml b/tests/data/bbsim-kind-2OLTx2ONUx2PON.yaml
index bdf94da..14b995e 100755
--- a/tests/data/bbsim-kind-2OLTx2ONUx2PON.yaml
+++ b/tests/data/bbsim-kind-2OLTx2ONUx2PON.yaml
@@ -50,12 +50,12 @@
       olt: 'BBSIM_OLT_0'
     -
       onu: 'BBSM00010001'
-      c_tag: '900'
+      c_tag: '901'
       s_tag: '900'
       olt: 'BBSIM_OLT_1'
     -
-      onu: 'BBSM00010001'
-      c_tag: '901'
+      onu: 'BBSM00010002'
+      c_tag: '902'
       s_tag: '900'
       olt: 'BBSIM_OLT_1'
   dst: