Add support for SELinux modules

selinux_module
==============

SELinux module resource type.

be_enabled
----------

In order to test a given SELinux module is enabled(being enforce by the current SELinux policy), you should use the be_enabled matcher.

```ruby
describe selinux_module('bootloader') do
  it { should be_enabled }
end
```

be_installed
------------

In order to test a SELinux modules is installed, you should use the be_installed matcher.

```ruby
describe selinux_module('bootloader') do
  it { should be_installed }
end
```

You can also test a given version of the SELinux module is installed.

```ruby
describe selinux_module('bootloader') do
  it { should be_installed.with_version('1.13.2') }
end
```