Comment 15 for bug 1723191

Reviewed: https://review.opencontrail.org/37483
Committed: http://github.com/Juniper/contrail-controller/commit/4bcd6213a43909e01feb0e87b9860993f529f59d
Submitter: Zuul (<email address hidden>)
Branch: R4.1

commit 4bcd6213a43909e01feb0e87b9860993f529f59d
Author: Suresh Venkata <email address hidden>
Date: Mon Nov 13 12:13:06 2017 -0800

reduce number of keystone interactions on a neutron call

Description: A neutron call transforms to multiple api calls.
In addition to authenticating relayed neutron call from plugin,
each individual api calls are subjected to keystone authentication
slowing the overall response time of neutron call.
This change tracks the authentication credentials of the first call
and reuses them for the subsequent calls.
GET requests go through localvncapi. So, only for those calls,
this change is applicable. Once all other requests go through
localvncapi server, it can be applicable for them also.

Change-Id: I286a7b8b13963f788343c924e53f1be0a0e157db
Closes-Bug: #1723191