config-scaling: Scaling improvements for startup in R2.20

[Hampapur Ajay]

On a scaled setup it was observed that on startup of schema transformer there were quite a lot of 'vm not found for interface ...' and reads of service-template and service-instance in R2.20.

As a low-risk for the benefits following can be done to alleviate the situation:
1. read all the virtual machines in re-init so later path of syncing from ifmap already has a local copy
2. cache the service-mode information for avoiding repeated accesses to svc-template and svc-instance

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/13610
Submitter: Hampapur Ajay (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/13610
Committed: http://github.org/Juniper/contrail-controller/commit/3654d9e0a08546f921f1583a9ea9371aedf23f87
Submitter: Zuul
Branch: R2.20

commit 3654d9e0a08546f921f1583a9ea9371aedf23f87
Author: Hampapur Ajay <email address hidden>
Date: Sat Sep 5 15:46:53 2015 -0700

config-scaling: read in vm during re-init and cache service-mode info.

Change-Id: I03ebb1b556dd6a2d1a8ce9e3a956ec3be7da3522
Closes-Bug: #1492646

[Sachin Bansal (sbansal)]

Fixed in master with rabbitmq changes for schema transformer

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/14211
Submitter: Hampapur Ajay (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/14211
Committed: http://github.org/Juniper/contrail-controller/commit/6347981ff818d382fe492db3eaa7a40f0b9d480b
Submitter: Zuul
Branch: R2.20.x

commit 6347981ff818d382fe492db3eaa7a40f0b9d480b
Author: Hampapur Ajay <email address hidden>
Date: Sat Sep 5 15:46:53 2015 -0700

config-scaling: read in vm during re-init and cache service-mode info.

Change-Id: I03ebb1b556dd6a2d1a8ce9e3a956ec3be7da3522
Closes-Bug: #1492646
(cherry picked from commit 3654d9e0a08546f921f1583a9ea9371aedf23f87)