Add switch on/off script for cluster demo

Add switch on/off script for cluster demo

v2.0: (Tadao Tanikawa)
Completely rebuilt. The mapviewer and mapvier-demo are installed
into porter's image only because they need AGL CES2017 Demo mock-up.

To enable mapviewer-demo, execute switch_on_mapviewer-demo.sh at
/usr/AGL/mapviewer-demo then reboot porter.

CAUTION: After enabling mapviewer-demo, without cluster mock up
         which connected directly to porter board,
         weston on the porter board would always crash
         immediately after booting.

         If you fall into that situation, disable mapviewer-demo
         following instructions below.

To disable mapviewer-demo, execute switch_off_mapviewer-demo.sh at
/usr/AGL/mapviewer-demo then reboot porter.

v1.0: (Yusuke Nakamura)
This addes script to enable/disable CES2017 cluster
demo to /usr/AGL/cluster-demo. Once switch_on_cluster-demo.sh
is executed, this enables a service for cluster demo and
sets configurations for the dmeo.

Change-Id: Ie10f35ff4168095c3b3c6572579a2c4799c04578
Signed-off-by: ynakamura <ynakamura@jp.adit-jv.com>
Signed-off-by: Tadao Tanikawa <tanikawa.tadao@jp.panasonic.com>