Allow rspec-beaker to update.

Previously the dependencies for rspec-system were holding back rspec-beaker and specinfra.
I believe this Rake problem has been fixed upstream.
Fix hiera.yaml creation on PE.
Missed a couple of tests to gate off for unsupported platforms.
Adds "Release Notes/Known Bugs" to Changelog, updates file format to markdown, standardizes the format of previous entries

Per a request to have initial release notes that specifically listed known issues for this PE 3.2 release, and barred by time constraints from automating a pull from open issues in JIRA, this commit adds a Release Note and Known Bug section to the Changelog for the imminent 3.2 release. As it will display on the Forge, updates file type to markdown and standardizes previous entries. Adds template for release notes to be filled in later.
Prepare metadata for supported modules.
Supported Release 2.2.2

Summary
=======
This is a supported release. Mostly comprised of enhanced testing, plus
a
bugfix for Suse.

Bugfixes
--------
- PHP bindings on Suse
- Test fixes

Known Bugs
----------
* No known bugs
Patch metadata
Replace the symlink with the actual file to resolve a PMT issue.
Prepare a 2.2.3 supported release.
Fix the path for the hiera file.
Merge pull request #514 from mhaskel/merge-2.2.x

Merge 2.2.x
Fixes to get tests running on RHEL5.

Existing EPEL addition in spec_helper_acceptance wasn't actually working, so pulled in stahnma-epel and applied that in the bindings test, since that's the only place it's actually required.
Merge pull request #515 from mhaskel/rhel5-fixes

Fixes to get tests running on RHEL5.
Add RHEL7 and Ubuntu 14.04.
Merge pull request #516 from apenney/fix-platforms

Add RHEL7 and Ubuntu 14.04.
Prepare 2.3.0 release.
Claim PE3.3 support.
Install MySQL client and daemon dev libraries.
Fix a syntax error in one of the tests.