Fix kilo rdo path
Fix kilo rdo path

The old URL returns 404 Not Found error.

Therefore I changed it to 'rdo-release-kilo-2.noarch.rpm'

Signed-off-by: wikibootup <wikibootup@gmail.com>

Change-Id: Ia3d37d27029d9a3b8215a55806807c2435594694

openstack/training-labs,openstack/training-labs,openstack/training-labs