Add logging for salt-api requests/responses

Change-Id: I0dd73c60cc4364ce5962ddb2520390ad3ee32f06
Closes-Task:#PROD-29994(PROD:29994)
diff --git a/test_set/cvp-sanity/tests/test_services.py b/test_set/cvp-sanity/tests/test_services.py
index 224c207..fac31e5 100644
--- a/test_set/cvp-sanity/tests/test_services.py
+++ b/test_set/cvp-sanity/tests/test_services.py
@@ -1,6 +1,7 @@
 import pytest
 import json
 import utils
+import logging
 
 # Some nodes can have services that are not applicable for other nodes in similar group.
 # For example , there are 3 node in kvm group, but just kvm03 node has srv-volumes-backup.mount service
@@ -30,7 +31,7 @@
     for node in services_by_nodes:
         if not services_by_nodes[node]:
             # TODO: do not skip node
-            print "Node {} is skipped".format (node)
+            logging.info("Node {} is skipped".format (node))
             continue
         nodes.append(node)
         all_services.update(services_by_nodes[node])