Revert "engine : VdsUpdateRuntimeInfo updates the data of a specific VDS."

This reverts commit ada255ebded1bf71f0e19c005dd2982914309173.

Change-Id: I0c1d190fc24c0c31d871c3269bd7faee25a721ea
Signed-off-by: Yair Zaslavsky <yzaslavs@redhat.com>