Comment 16 for bug 1744914

Reviewed: https://review.opencontrail.org/41853
Committed: http://github.com/Juniper/contrail-controller/commit/d196bc80eafd3d7ebb0400da39e9088bb7bd9786
Submitter: Zuul v3 CI (<email address hidden>)
Branch: master

commit d196bc80eafd3d7ebb0400da39e9088bb7bd9786
Author: bmadhu <email address hidden>
Date: Mon Mar 12 15:55:29 2018 +0530

Unnecessary sessions getting logged with out SLO rate check

Idle sessions for which stats are not changed can be logged with SLO rate match
is not a bug.

This fix has below change:
With this change, all tear down sessions will not be logged.
Tear down sessions which are logged earlier at least once will be logged immidiately
with out checking rate, otherwise it will be considered as normal session and will be
reported only after matching the SLO rate.

Change-Id: I0f1ae5e4239fec9eebe57c8b34b6f20c3431403a
Closes-Bug: 1744914
(cherry picked from commit af50b7e2c41548d845dfcbf017c8e0b026476939)