iso build should fail when docker build fails

[Matthew Mosesohn]

If puppet apply returns nonzero, we should cancel the ISO build and mark it a failure.

Refer to gerrit docker iso 296 as an example.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/107039

[OpenStack Infra (hudson-openstack)]

Related fix proposed to branch: master
Review: https://review.openstack.org/107284

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/107039
Committed: https://git.openstack.org/cgit/stackforge/fuel-main/commit/?id=95f1a60a5a2cc987edd4a257fd875355d64a25f9
Submitter: Jenkins
Branch: master

commit 95f1a60a5a2cc987edd4a257fd875355d64a25f9
Author: Matthew Mosesohn <email address hidden>
Date: Tue Jul 15 16:55:47 2014 +0400

    Fail docker build if puppet fails

    Puppet does not return non-zero exit code if
    there are errors during deployment.

    FIXME: Cobbler has iptables bugs. Implement at future date.

    Change-Id: I86834cb62beac981e8c3defb8b2d90bafafb84b6
    Closes-Bug: #1337288

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/107284
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=e91c20221ee687066e058664162430b4131c8f62
Submitter: Jenkins
Branch: master

commit e91c20221ee687066e058664162430b4131c8f62
Author: Matthew Mosesohn <email address hidden>
Date: Wed Jul 16 13:42:59 2014 +0400

    Cobbler docker mode fixes

    Skip cobbler::iptables in docker container for
    all docker modes and don't create profiles and
    distros during docker build.

    IPtables cannot be modified inside a Docker
    container. It creates errors that interfere
    with deployment.

    Change-Id: I9c3f54f3c0fd2afdcb425d37a3daecfa3c0173af
    Closes-Bug: #1342075
    Related-Bug: #1337288