Enable multi-subscriber support with ponsim.

Change-Id: I8ad6684f717ca78074f815d0907e8909e500734d
diff --git a/src/test/utils/OltConfig.py b/src/test/utils/OltConfig.py
index cd52ff5..3b4254d 100644
--- a/src/test/utils/OltConfig.py
+++ b/src/test/utils/OltConfig.py
@@ -38,6 +38,7 @@
     def olt_port_map(self):
         if self.on_olt() and self.olt_conf.has_key('port_map'):
             port_map = {}
+            port_map['ponsim'] = self.olt_conf['port_map'].has_key('ponsim')
             if self.olt_conf['port_map'].has_key('switches'):
                 port_map['switches'] = self.olt_conf['port_map']['switches']
             else: