Ubuntu unable to locate package

I have installed devstack for openstack on ubuntu system. I am trying to install quantum-lbaas-agent. I get the error Unable to locate package. I tried changing the the sources list in the /etc/apt/sources.list file. I was unable to edit it and hence I changed permissions to 777 for sources.list. I ran sudo apt-get update after changing the permission. I still get the unable to locate package error. I tried running sudo apt-get upgrade as well. Still there was no progress.

Here is the output of sudo apt-get install quantum-lbaas-agent:

Reading package lists... DoneBuilding dependency tree       Reading state information... DoneE: Unable to locate package quantum-lbaas-agent

here is my sources.list in the /etc/apt folder:

# deb cdrom:[Ubuntu 12.04.2 LTS _Precise Pangolin_ - Release i386 (20130213)]/ precise main restricted# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to# newer versions of the distribution.deb http://in.archive.ubuntu.com/ubuntu/ precise main restricteddeb-src http://in.archive.ubuntu.com/ubuntu/ precise main restricted## Major bug fix updates produced after the final release of the## distribution.deb http://in.archive.ubuntu.com/ubuntu/ precise-updates main restricteddeb-src http://in.archive.ubuntu.com/ubuntu/ precise-updates main restricted## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu## team. Also, please note that software in universe WILL NOT receive any## review or updates from the Ubuntu security team.deb http://in.archive.ubuntu.com/ubuntu/ precise universedeb-src http://in.archive.ubuntu.com/ubuntu/ precise universedeb http://in.archive.ubuntu.com/ubuntu/ precise-updates universedeb-src http://in.archive.ubuntu.com/ubuntu/ precise-updates universe## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu ## team, and may not be under a free licence. Please satisfy yourself as to ## your rights to use the software. Also, please note that software in ## multiverse WILL NOT receive any review or updates from the Ubuntu## security team.deb http://in.archive.ubuntu.com/ubuntu/ precise multiversedeb-src http://in.archive.ubuntu.com/ubuntu/ precise multiversedeb http://in.archive.ubuntu.com/ubuntu/ precise-updates multiversedeb-src http://in.archive.ubuntu.com/ubuntu/ precise-updates multiverse## N.B. software from this repository may not have been tested as## extensively as that contained in the main release, although it includes## newer versions of some applications which may provide useful features.## Also, please note that software in backports WILL NOT receive any review## or updates from the Ubuntu security team.deb http://in.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiversedeb-src http://in.archive.ubuntu.com/ubuntu/ precise-backports main restricted universe multiversedeb http://security.ubuntu.com/ubuntu precise-security main restricteddeb-src http://security.ubuntu.com/ubuntu precise-security main restricteddeb http://security.ubuntu.com/ubuntu precise-security universedeb-src http://security.ubuntu.com/ubuntu precise-security universedeb http://security.ubuntu.com/ubuntu precise-security multiversedeb-src http://security.ubuntu.com/ubuntu precise-security multiverse## Uncomment the following two lines to add software from Canonical's## 'partner' repository.## This software is not part of Ubuntu, but is offered by Canonical and the## respective vendors as a service to Ubuntu users.# deb http://archive.canonical.com/ubuntu precise partner# deb-src http://archive.canonical.com/ubuntu precise partner## This software is not part of Ubuntu, but is offered by third-party## developers who want to ship their latest software.deb http:extras.ubuntu.com/ubuntu precise maindeb-src http://extras.ubuntu.com/ubuntu precise main

Can someone help please. I am really stuck at this point. I have looked up various posts on ubuntu forums, etc.

Thanks in advance.