Debian/Ubuntu: The staging driver package is not available

... so the deployment should fail the user explicitly requires it.

Change-Id: Ibd0fe69f2a2d0defb648d06e8098712f84de45e6

manifests/drivers/staging.pp

@@ -15,10 +15,13 @@ class ironic::drivers::staging (
   include ironic::deps
   include ironic::params
 
-  package { 'ironic-staging-drivers':
-    ensure => $package_ensure,
-    name   => $::ironic::params::staging_drivers_package,
-    tag    => ['openstack', 'ironic-support-package'],
+  if $::ironic::params::staging_drivers_package {
+    package { 'ironic-staging-drivers':
+      ensure => $package_ensure,
+      name   => $::ironic::params::staging_drivers_package,
+      tag    => ['openstack', 'ironic-support-package'],
+    }
+  } else {
+    fail('This distribution does not provide the staging driver package.')
   }
-
 }

spec/classes/ironic_drivers_staging_spec.rb

@@ -41,18 +41,17 @@ describe 'ironic::drivers::staging' do
     end
   end
 
-  # TODO: use OSDefaults.get_supported_os when ironic-staging-drivers is
-  # packaged for Debian and Ubuntu
   on_supported_os({
-    :supported_os   => [ { 'operatingsystem' => 'CentOS',
-                           'operatingsystemrelease' => [ '7' ] } ]
+    :supported_os => OSDefaults.get_supported_os
   }).each do |os,facts|
     context "on #{os}" do
       let (:facts) do
         facts.merge!(OSDefaults.get_facts())
       end
 
-      it_configures 'ironic-staging-drivers'
+      if facts[:osfamily] == 'RedHat'
+        it_configures 'ironic-staging-drivers'
+      end
     end
   end