(#23316) Update yum package provider support :holdable

This commit adds support for the `holdable` package feature to the yum
package provider. If the yum versionlock plugin is available packages
can specify an ensure value of 'held' and the yum provider will use the
versionlock plugin to lock the version.

This feature has the caveat that it can only be enabled at provider load
time since provider features cannot be enabled based on a code block.
(maint) Fix major performance regression in Puppet specs

 - This one seemingly innocuous change resulted in an increase
   of spec run time from 20 minutes to 2 hours on Win2003R2 and
   a series of type conversion errors in specs on Win2008R2 that
   it has been theorized are a result of memory pressure exerted
   by the change.  This has also caused slowdowns across the
   boards in other specs, and more diagnostic work is being
   performed to determine the root cause.
 - For now, this change is being merged as it clears out a number
   of CI issues that we're experiencing.
Merge branch 'maint/master/environment-performance-regression'

* maint/master/environment-performance-regression:
  (maint) Fix major performance regression in Puppet specs
(PUP-1282) Allow patch version float on windows dependencies

This loosens the version dependency of the windows specific gems a bit
to allow for floating on the patch part of the version number. This
allows better compatibility as future updates are made to dependency
versions.
Merge pull request #2283 from ferventcoder/issue/master/PUP1282-windows_gem_dependencies

(PUP-1282) Express Windows specific gem dependencies
(PUP-1484) Fix serialization of TagSet

The TagSet class didn't include FormatSupport and didn't have a
to_data_hash method, so it couldn't be serialized to msgpack.
(PUP-1118) Add check for getting multiple environments

The acceptance test now checks for getting multiple environments listed
from the environmentsdir
(PUP-1118) List environments from a directory

This starts the process of creating a Puppet::Environments::Directory
that will find environments from a particular directory. The directory
has sub-directories, where each sub-directory name is the environment
name.
(PUP-1118) Load full environments from a directory

This changes the loader used by the code to list environments to be a
composition of the legacy environments and the new directory
environments.
(PUP-1118) Simplify Puppet::Context

Puppet::Context can reduce the number of objects that it uses for
tracking contexts by keeping everything internal to it. This actually
results in much less code, but a few more instance variables to track.
Overall is seems like an easier to understand system.
(PUP-1118) Create a new context after app initialization

There end up being 3 steps of initialization in puppet:
  * bootstrap: after code starts loading, but before initialize_settings
    is called
  * initial: after initialize_settings is called, but before an
    application has been loaded and sets up the true run mode
  * application: after an application has started running, set the run
    mode, and reinitialized the app default settings.

This last one had been missed in previous changes to have puppet setup
the right contexts. This now setups another context override in the
Puppet::Application run method to control the application context.
(PUP-1118) Make environments readable by puppet master

The directories that were made for the environment listing tests were
not actually readable by the master. This changes them to be readable.
Add initial support for building in a RHEL 7 mock

Building in an x86_64 mock, since RHEL has not provided a 32-bit release.
Merge branch 'pull-2287'

This closes GH-2287
(PUP-1118) Document Puppet::Environments

This also creates two new rake tasks for generating the documentation:
doc:api and doc:all. The doc:api is to generate the published docs,
which omits portions of the code that hasn't been tagged. doc:all just
outputs everything.
Merge pull request #2292 from mckern/add-el7-for-mocks

Add initial support for building in a RHEL 7 mock
(PUP-1118) Move root environment to Context

And adjust TestHelper initialization to preserve base context setup
without requiring settings initialization in before_all_tests hook.

Initializing settings in the before_all_tests was causing a slowdown
somewhere in call_hooks_deferred_to_application_initialization.

The issue came from the root environment needing to have the modulepath,
which interpolates in the confdir to produce the value. However,
after an initial run, the after each hook tears down the settings, which
makes them unavailable in the second before all call. This problem had
been masked previously because of the way the root environment was
cached and not reset between tests.
(maint) Only load yard tasks if yard is available
(PUP-1151) Respond with 404 when path not known

The v2.0 api implementation had a type that was not caught by any tests.
This fixes that issue (a typo) and adds a test that would have shown the
problem.
(PUP-1387) fixes wrong hash in subjectKeyIdentifier

this fixes the regression that appeared when the arguments to
ExtensionFactory where accidentally swapped.
Also added a test case to check if the subjectKeyIdentifier is present.