Comment 9 for bug 1676495

Reviewed: https://review.opencontrail.org/31734
Committed: http://github.com/Juniper/contrail-controller/commit/18ff7724befb38174ca3fe8d1bc845fec4b8885a
Submitter: Zuul (<email address hidden>)
Branch: R4.0

commit 18ff7724befb38174ca3fe8d1bc845fec4b8885a
Author: Nabeel Asim <email address hidden>
Date: Fri May 12 00:37:30 2017 +0500

Support full range of local preference

Contrail controller should be able to provide active backup
functionality with multiple backup options to choose for a
path, ordered based on priority without forming an ECMP.

Virtual machine interface already supports local preference
configuration, but however it internally only allow
configuration of 200 everything else is overridden by value
100. This limits the scope to be able to provide multiple
backup paths to only one.

Converting enum to uint32_t to hold full range of configured
local preference to support multiple backup paths ordered
using local preference.

Change-Id: I549df3631e4f47bf43f4118ee799c74b53bb3a19
Closes-Bug: #1676495