Closes-Bug: #1635035 Switchover to using SM Cliff Client as default c…

…lient

With this change when you give setup.sh --all, the cliff client will be used by default.
Please note that:

You can still use ALL the same server-manager commands in your scripts EXCEPT for server-manager show
This command will now be changed to server-manager display
You will need to change your scripts if you use the server-manager show command
All the options, parameters etc. remain the same.

We are not deprecating the old client package as of now.

At anytime for any reason if you wish to go back to the old client, please issue below two commands:
unlink /usr/bin/server-manager
ln -s /opt/contrail/server_manager/client/server-manager /usr/bin/server-manager

Change-Id: I6b93fa8dd5f5266769cb5fba1d6fdf1a0131b988

common/debian/contrail-server-manager-cliff-client/debian/postinst

@@ -5,4 +5,9 @@ set -e
 
 echo "running post install"
 
+if [ -e /usr/bin/server-manager ]; then
+        unlink /usr/bin/server-manager
+fi
+
 /opt/contrail/bin/setup_server_manager_client.sh
+ln -s /opt/contrail/bin/server-manager-client /usr/bin/server-manager