[VOL-3058][VOL-3059][VOL-3615] Multi-OLT framework changes and updated ATT, DT, TT existing tests accordingly

Change-Id: Iad0a6d4fba3c2bf647b8a844413e8d16405cd121
diff --git a/tests/data/bbsim-kind-2x2.yaml b/tests/data/bbsim-kind-2x2.yaml
index 4ee3a12..4618002 100644
--- a/tests/data/bbsim-kind-2x2.yaml
+++ b/tests/data/bbsim-kind-2x2.yaml
@@ -35,15 +35,19 @@
 hosts:
   src:
     - onu: 'BBSM00000001'
+      olt: 'BBSIM_OLT_0'
       c_tag: '900'
       s_tag: '900'
     - onu: 'BBSM00000002'
+      olt: 'BBSIM_OLT_0'
       c_tag: '901'
       s_tag: '900'
     - onu: 'BBSM00000101'
+      olt: 'BBSIM_OLT_0'
       c_tag: '902'
       s_tag: '900'
     - onu: 'BBSM00000102'
+      olt: 'BBSIM_OLT_0'
       c_tag: '903'
       s_tag: '900'