Comment 6 for bug 1712936

Reviewed: https://review.opencontrail.org/37024
Committed: http://github.com/Juniper/contrail-server-manager/commit/91231515d9875bdee540d61e3eeb8164092ec6a0
Submitter: Zuul (<email address hidden>)
Branch: R4.0

commit 91231515d9875bdee540d61e3eeb8164092ec6a0
Author: nitishkrishna <email address hidden>
Date: Tue Sep 5 16:00:38 2017 -0700

Closes-Bug: #1712936 - Don't display local_exec_cmd Errors during puppet clean

Do not display messages like:

[2017-08-24 15:37:37,965: local_exec_cmd] None
Configuring => 5a10s29
[2017-08-24 15:38:17,586: local_exec_cmd] Error: Could not find a certificate for 5a10s29.contrail.juniper.net

[2017-08-24 15:38:17,586: local_exec_cmd] None
Configuring => contrailvm-5a10s27
[2017-08-24 15:39:04,850: local_exec_cmd] Error: Could not find a certificate for contrailvm-5a10s27.contrail.juniper.net

Change-Id: I0d7d131782fc3f28afc6892d866d1f070cee9f73
(cherry picked from commit c896a9368f9adefd5847bee9cb468c8a9b8f1cb2)