Pin Rake to 10.1.1 in Gemfile

The latest Rake update requires Ruby >= 1.9. This update
fixes the failing 1.8.7 tests by pinning Rake to the last
supported version on ruby 1.8.7.
Merge pull request #276 from blkperl/fix_rake

Pin Rake to 10.1.1 in Gemfile
backports: Allow setting a custom priority.

The module used to always pin backports to a priority of 200. This
default is still retained but is now configurable.

Additionally the default is now an Integer, not a 'quoted Integer' and
the tests have been updated to reflect this. This matters for future
parser as it will now kick people if they pass in a stringified integer
as priority.
Merge pull request #275 from daenney/backports-pin-priority

backports: Allow setting a custom priority.
unattended_upgrades: Fix matching security archive

The default configuration we were writing for Debian was only working
for Squeeze, from Wheezy and onwards this wasn't working anymore. This
has to do with the fact that we should now be using Origins-Pattern
according to the unattended-upgrades docs. However, Ubuntu didn't
entirely get with the program yet...

This change reflects the defaults that unattended-upgrade installs on
every platform we support. In order to do so the unattended-upgrades
Debian archive for Squeeze, Wheezy, Lucid, Precise and Trusty were
downloaded and the default /etc/apt/apt.conf.d/50unattended-upgrades
checked for its content with regard to using Allow-Origins or
Origins-Pattern.

Fixes #277
Merge pull request #278 from daenney/fix-unattended-upgrades

unattended_upgrades: Fix matching security archive
Small patch to fix the spacing that makes lint fail.
Merge pull request #279 from apenney/fix-spacing

Small patch to fix the spacing that makes lint fail.
pin: Fix the template.

In APT preferences files the only allowed comments are lines that start
with `Explanation:`, commented lines that start with a # trigger a
myriad of interesting bugs. This is considered a feature of APT.

Because we're only ever writing a single file at a time with only a #
comment at the top we were getting away with this but it shouldn't be
there in the first place.
pin: caller_module_name is not a topscope variable
unattended-upgrades: Fix origins for Squeeze.

Because Squeeze is now oldstable we need to add an oldstable line too
otherwise security updates won't be picked up. This is still because we
can't match on codename.
Merge pull request #281 from daenney/unattended-upgrades-squeeze-origins

unattended-upgrades: Fix origins for Squeeze.
Merge pull request #280 from daenney/fix-pin-comments

Fix pin comments
Add security warning re: short keys
Merge pull request #282 from laurenrother/security

Add security warning re: short keys
Writing proxy configuration in apt.conf.d/01proxy.

This commit changes the proxy file name to be more consistent with other files
in `apt.conf.d`. The old file (`apt.conf.d/proxy`) is removed.

Tests has been updated.
Merge pull request #283 from johanfleury/master

Change proxy's configuration file to be consistent with other config files in apt.conf.d
Prepare metadata for supported module release.
(cherry picked from commit ab03a989df37df3660f0916519d0f78f7ab73a13)
Add back in missing fields to work around Puppet bug.
(cherry picked from commit dc472717163d30a4463f687a577238ec2539601c)