Fix cloudinit interface name

also, print the actual env variables values instead of defaults

Change-Id: Ied35235056726ec1da812b58861fe77782642e6f
Reviewed-on: https://review.gerrithub.io/362795
Reviewed-by: Dennis Dmitriev <dis.xcom@gmail.com>
Tested-by: Dennis Dmitriev <dis.xcom@gmail.com>
diff --git a/tcp_tests/helpers/utils.py b/tcp_tests/helpers/utils.py
index 9501e01..001cf3e 100644
--- a/tcp_tests/helpers/utils.py
+++ b/tcp_tests/helpers/utils.py
@@ -330,7 +330,7 @@
         if default is None:
             required_env_vars.add(var_name)
         else:
-            optional_env_vars[var_name] = default
+            optional_env_vars[var_name] = var
 
         return var
 
@@ -352,7 +352,7 @@
     if optional_env_vars:
         LOG.info("Optional environment variables:")
         for var, default in sorted(optional_env_vars.iteritems()):
-            LOG.info("    {0} , default value = {1}".format(var, default))
+            LOG.info("    {0} , value = {1}".format(var, default))
     return template