Comment 13 for bug 1576798

Reviewed: https://review.opencontrail.org/20374
Committed: http://github.org/Juniper/contrail-controller/commit/23e8295d420bb72d948ecb52253dafbf0fe7328c
Submitter: Zuul
Branch: master

commit 23e8295d420bb72d948ecb52253dafbf0fe7328c
Author: arvindvis <email address hidden>
Date: Fri May 27 12:09:49 2016 -0700

This fix provides a max_queue_length attribute for the sandesh
queues on the send and recieve end
A new sandesh field has been added to the following UVE to
provide this information:
SandeshModuleClientTrace (reports send sandesh sm max_queu_size)
SandeshMessageStatsReq (reports send sandesh queue max_queue_size)
ShowCollectorServerResp (reports collector sandesh SM max_queue_size)

Currently the work_queue implementation already has a variable
max_queue_len_ in C++, but python does not have it. This variable
maintains the max_q_size reached so far. This is added as part of the
fix.
(cherry picked from commit ececa85dca99e50cb0f3e0df8790bb2c8224d085)
Partial-Bug: 1576798
Change-Id: Ifdde919aa9ad8c2b4f2600f8673af62123875fc2