Expose the ports for cord-tester ONOS instance when using the default manifest files for voltha/ponsim.
This allows external connectivity to the ONOS instance

Change-Id: I706a08b520473155facf6fcbe757f1acbe2ae8b4
diff --git a/src/test/setup/manifest-voltha.json b/src/test/setup/manifest-voltha.json
index 1c061a5..acbbb39 100644
--- a/src/test/setup/manifest-voltha.json
+++ b/src/test/setup/manifest-voltha.json
@@ -7,5 +7,6 @@
     "jvm_heap_size" : "1G",
     "karaf_version" : "3.0.8",
     "voltha_loc" : "/home/ubuntu/voltha/incubator/voltha",
-    "voltha_intf" : "eth0"
+    "voltha_intf" : "eth0",
+    "expose_port" : true
 }