Update notes for submitted changes

*     Summary of changes:     1)Contrail.spec file moved to tools/packages/rpm/contrail     2)ifmap-server fetched from cache and not built every time     3) In contrail.spec, git version info for packages removed, decsription added, scripts changed to add user contrail and group contrail.     4) ini scripts of supervisor daemons changed to user contrail so that they run as user contrail and not as root[webui,database and vrouter run as root]     5) only supervisor runs as root     6) user contrail owns /var/log/contrail and /usr/share/ifmap-server