(maint) Update ruby sha used to build

We've updated the certs included in ruby to access rubygems.org.
Since the website has updated their certs, we were behind, and
installing gems using the provided package of rubygems would fail. This
commit updates the sha of puppet-win32-ruby we are pulling in to include
in the msi build. This will provide the additional certs for use, and
allow people to access rubygems.org via the provided rubygem package.
Merge pull request #3419 from melissaanne/stable

(maint) Update ruby sha used to build
(PUP-3769) resource/service/should_not_change_the_system should only run on agents

Use the agents object to more definitely run against the proper
machines.  This test would previously error on windows runs after the agent
role is removed from the master for windows tests.  This change fixes
this issue.
(PUP-3378) Don't require puppet resource service output to be the same

Previously, the acceptance test would execute `puppet resource service`
twice, and compare the output to ensure puppet did not change the state
of the system. This was done because in the past the `init` service
provider would invoke the status command on all scripts in /etc/init.d,
including /etc/init.d/reboot.sh, which would unconditionally reboot the
system[1]

However, this test is not reliable as some platforms like fedora 19 &
20 have services that change state between the two puppet runs, e.g.
NetworkManager-dispatcher.service, and this behavior is unrelated to
puppet.

This commit removes the requirement that the `puppet resource service`
command be identical. We continue to execute `puppet resource service`
twice and compare the output of the ssh(d) service. We also have specs
to ensure that the `init` service's instances method excludes dangerous
scripts.

This commit also changes the test to use beaker's `puppet` DSL method,
which is the preferred way of executing puppet in acceptance tests.

[1] http://projects.puppetlabs.com/issues/14615

Paired-with: Eric Thompson <erict@puppetlabs.com>