replace lxc-templates cloud-utils recommends with cloud-image-utils

cloud-utils was split up to reduce dependencies.
cloud-image-utils contains 'cloud-localds' which is what lxc-templates wants to use.

We can replace the Recommends there with cloud-image-utils and then remove at least one unnecessary package.

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: lxc 0.9.0-0ubuntu23
ProcVersionSignature: Ubuntu 3.11.0-6.12-generic 3.11.0
Uname: Linux 3.11.0-6-generic x86_64
ApportVersion: 2.12.1-0ubuntu3
Architecture: amd64
Date: Thu Sep 12 11:32:24 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2011-10-19 (694 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
MarkForUpload: True
SourcePackage: lxc
UpgradeStatus: Upgraded to saucy on 2013-05-20 (115 days ago)
defaults.conf:
 lxc.network.type = veth
 lxc.network.link = lxcbr0
 lxc.network.flags = up
lxcsyslog:
 Sep 12 09:08:41 brickies kernel: [167579.670127] type=1400 audit(1378991321.419:107): apparmor="STATUS" operation="profile_replace" parent=5416 profile="unconfined" name="lxc-container-default" pid=5423 comm="apparmor_parser"
 Sep 12 09:08:41 brickies kernel: [167579.670526] type=1400 audit(1378991321.419:108): apparmor="STATUS" operation="profile_replace" parent=5416 profile="unconfined" name="lxc-container-default-with-nesting" pid=5423 comm="apparmor_parser"
 Sep 12 09:08:41 brickies kernel: [167579.932678] type=1400 audit(1378991321.683:112): apparmor="STATUS" operation="profile_replace" parent=5416 profile="unconfined" name="/usr/bin/lxc-start" pid=5427 comm="apparmor_parser"