(RE-1497) Remove quantal from build_defaults

This commit removes quantal from all build defaults because it is end of
life. It removes the defaults from the build_defaults yaml.
Merge pull request #2807 from clantant/RE-1497/stable/srcs

(RE-1497) Remove quantal from build_defaults
(maint) Disable timesyncing for acceptance tests

We have been seeing windows time service errors on 2008R2 while
performing time syncing. This step should not actually be necessary
as vsphere seems to provide synchronized time across VMs from the pool.
(maint) Pin puppet git acceptance to use facter 2.0.2

Previously, when running acceptance tests on platforms that still use
git checkouts, e.g. Windows, we were installing puppet#stable and
facter#stable. However, we recently released facter 2.1, which now
resides in facter#stable. On Windows, facter 2.1 requires a newer
win32-security gem than what puppet#stable installs, causing errors
like:

    lib/win32/security.rb:54:in `elevated_security?': Incorrect function

This commit ensures we install facter 2.0.2 (commit 7845c9aa0df) when
running acceptance from git checkouts. This should only affect Windows
and Solaris, as Linux acceptance runs against packages, which will pull
in the most recently released dependencies.
(maint) mount: fix awkward grammar in :dump docstring
(maint) mount: remove spurious newvalue invocation from :dump
Merge pull request #2843 from ffrank/main/mount-doc-wording

Maint/mount doc wording
(maint) Pinning rest-client to 1.6.7
(maint) Pin rest-client gem to 1.6.7

This commit addresses spec failures under ruby 1.8.7.

Background:
Puppet uses the couchrest gem for the soon-to-be-deprecated
couchdb facts terminus. The couchrest gem has a pessimistic
dependency on the 1.6.x of the rest-client gem. The previous
release of the rest-client gem was 1.6.7 in 2011, but on July
8th 1.6.8 was released, and it introduced a dependency on
the rdoc 4 gem, which breaks various puppet code.

Since we're planning to deprecate this code anyway, and remove
it in puppet-4, I opted for the simple approach of pinning
this one dependency.
Merge branch 'stable'
Revert "(maint) Pin puppet git acceptance to use facter 2.0.2"

This reverts commit 401684525e1fc207486832a1f4a653a59132ce16.

The puppet/master branch doesn't need this pin.
(PUP-2732) Use less restrictive exec user validation

Without this patch Puppet agent validates the user attribute of exec resource that way, that it's fully unsupported if running without root user. Doing so, the following error message is printed and execution aborted:
"Only root can execute commands as other users". This patch ignores a given user to run the exec as if it's the same as the user actually running the Puppet agent process.
See https://tickets.puppetlabs.com/browse/PUP-2732 for more information.