Add check of scaling for Ambari
Add check of scaling for Ambari

Scaling has been tested manual, this is working

Change-Id: I7a2a871043490836532193bbb25bf39c0e151083

openstack/sahara-tests,openstack/sahara-scenario,openstack/sahara-tests,openstack/sahara-tests,openstack/sahara-scenario,openstack/sahara-scenario,openstack/sahara-tests