Partial-Bug: #1394419 - Creating Ubuntu Wrapper Package Containing SM, Client and Monitoring DEBs

This checkin:
- Adds a new package - contrail-server-manager-installer.deb
- The installer package is a "wrapper" package that contains Smgr, Smgr Client and Monitoring debian packages
- It also contains a setup.sh script that can be used to install these debians
- All dependencies are included except for puppet. These are downloaded and installed during Smgr install.
- Usage of setup.sh script is consistent across Centos and Ubuntu

Patch 2:
- Modified target to contrail for python-contrail package in contrail_sm_packages config

Patch 3:
- Added missing changelog.in

Change-Id: Ia7bd76af7e4178ca863ac6608de0a4459cc83232