Add net-tools dependency for Fedora/RHEL/CentOS

A minimal Fedora 19 setup doesn't have `arp` installed which blocks the
`boot-seed-vm` script.

Change-Id: I55e98ba2e4c7b8367b9d0b39a9ae17d8faf1ad43
Signed-off-by: Tomas Sedovic <tomas@sedovic.cz>
Merge "Add net-tools dependency for Fedora/RHEL/CentOS"