Enhancing contents of ServerManager Installer package

1. Adding contrail-web-ui rpm to contents of installer
2. Adding contrail-web-core rpm to contents of installer
3. Both packages will be in /opt/contrail/contrail-server-manager/packages/ after install

Change-Id: Ic6c975c19a4a905960e9da76252a7103a7baf043
Merge "Enhancing contents of ServerManager Installer package"