TT#38454 Depends on 'ethtool' in metapackages

In the past deployment.sh silently install the package on CE/PRO/Carrier
during Debian debootstrap stage and the package was missing on CE in
case of installation using plain debian+ngcp-installer.

ngcp-services-pro/carrier has dependency on ethtool already.

Change-Id: I8413e142159f0333178039f02d62213c8d07e90e

debian/control

@@ -365,6 +365,7 @@ Depends:
  bsd-mailx | mailx,
  bzip2,
  dbus,
+ ethtool,
  haveged,
  iptables-persistent,
  kannel,