[library] package resource munge - override "latest" as well

[Aleksandr Didenko]

We need to make sure we override (munge) "ensure => latest" just like we do for "ensure => present" in package resource.

In case we have a specific version requirement for the package, we'll install that version instead of "latest" - that's the behavior we expect during OpenStack patching. In other cases puppet will install "latest" available package.

We need to do this because some manifests may use "latest" instead of "present/installed" in their packages declaration and unexpected package upgrade during OpenStack patching (updating or downgrading packages) could cause huge problems. So it would be much safer and more convenient to override "ensure => latest" in "package" puppet resource than checking all manifests and replacing "latest" with "present".

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/110316

[Dmitry Ilyin (idv1985)]

All manifests in fuel 5.0.X were cleared from 'latest' packages and there are only 'installed' packages so this fix is not needed. In 5.1 we have taken manu manifests from upstream and there are some 'latest' packages again. We don't want to modify upstream packages so we need to override 'latests' to the vesion taken from version files as well as for 'installed' packeges. Without it rollback will not work because Puppet will try to installe lates package even if told to return to a previous one.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/110316
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=ba569a48f449da8df7afed9473b6a875457f4270
Submitter: Jenkins
Branch: master

commit ba569a48f449da8df7afed9473b6a875457f4270
Author: Dmitry Ilyin <email address hidden>
Date: Tue Jul 29 19:01:27 2014 +0400

    Lookup versions for :latest as well as :installed

    If there is a package vesion in version files take it
    instead of the latest version from repository not only for
    :present and :installed packages but for :latest too.

    There was no :latest packages in out manifests before
    but now we have some again and without his fix rollback will
    not work for these packages.

    Change-Id: Ifd14d644d1da4172e92562d693f74d2f542982dd
    Closes-Bug: 1348658