system-manager reimage places 127.0.0.1 as the address for hostname in /etc/hosts

[Ananth Suryanarayana]

127.0.0.1 is for lo0 interface and to resolve localhost and localhost.localdomain
It should not resolve the actual hostname of a system. This causes trouble to contrail-vrouter-agent when it setsup vhost0 interface, among other things

When server-manager reimages system with ubuntu distributions such as 14.04.4, /etc/hosts had an entry resolving 127.0.0.1 <actual-host-name>

Other intricate issues can show up with this, which can take hours to debug and to figure out..

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/23517
Submitter: Nitish Krishna Kaveri (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/23517
Committed: http://github.org/Juniper/contrail-server-manager/commit/6617e2528c2374b46e2a466f19655f9a58904204
Submitter: Zuul
Branch: master

commit 6617e2528c2374b46e2a466f19655f9a58904204
Author: nitishkrishna <email address hidden>
Date: Mon Aug 22 11:45:41 2016 -0700

Closes-Bug: #1615448 - Removing the /etc/hosts line resolving localhost addr to hostname

This should not be done, the entry 127.0.0.1 <actual-host-name> should not appear
This causes trouble to contrail-vrouter-agent when it setsup vhost0 interface

Change-Id: Ie5a8fd72740b1c6c6ebeb3debd45c4f7ce6a90f4