Support to run the vsg external connectivity test when on CiaB.
It uses the reserved one when on CiaB and unreserved one when on physical pod.
When on a physical pod, the xos subscriber needs to be created for s_tags in olt_config.json
(304 S-TAGS)
On pod variable includes currently both CiaB and real pod.

Change-Id: I604bdca32dfbfbe251f018c6b0391d4b5ac8ea86
diff --git a/src/test/utils/CordTestUtils.py b/src/test/utils/CordTestUtils.py
index 35c6d0d..6d46c16 100644
--- a/src/test/utils/CordTestUtils.py
+++ b/src/test/utils/CordTestUtils.py
@@ -61,6 +61,6 @@
     controllers = get_controllers()
     return controllers[0]
 
-def running_on_podd():
+def running_on_pod():
     """If we are running on Ciab or inside a physical podd, key file would be set"""
     return True if os.environ.get('SSH_KEY_FILE', None) else False