SELinux: Support for SELinux on RedHat platforms

Enable support for SELinux on RedHat platforms. The resource
SELinux will be activated before the installation of openstack
takes place.
Delete .fixtures.yml files and use librarian-puppet-simple

Using librarian-puppet-simple to read Puppetfile for your rspec-puppet
fixtures.
Merge pull request #693 from enovance/support_selinux

Support for SELinux on RedHat platforms
Merge pull request #724 from enovance/delete-fixtures-file

Delete .fixtures.yml files and use librarian-puppet-simple
lib/facter: add edeploy facts

First implementation of eDeploy facts.
They catch:
- release codename
- eDeploy role name
- eDeploy hardware profile name