Add parameter to configure enabled Sahara plugins

Tempest can be configured to check for the presence of certain
Sahara plugins (vanilla, cdh, etc.) via the
data-processing-feature-enabled/plugins variable in tempest.conf.
If the cloud has been set up with a non-default set of plugins in
sahara.conf, it is necessary to change this value, or the Tempest
run will fail.

Adding a new parameter $sahara_plugins to configure this.

Change-Id: I1f7626253728bcaf95773ef060d7a1264ae7e86f

manifests/init.pp

@@ -97,6 +97,9 @@
 #   Defaults to undef
 #  [*public_router_id*]
 #   Defaults to ''
+#  [*sahara_plugins*]
+#   (optional) List of enabled Sahara plugins
+#   Defaults to undef
 #  [*cinder_available*]
 #   Defaults to true
 #  [*glance_available*]
@@ -221,6 +224,8 @@ class tempest(
   $public_network_id             = undef,
   # Upstream has a bad defaul    t - set it to empty string.
   $public_router_id              = '',
+  # Sahara config
+  $sahara_plugins                = undef,
   # Service configuration
   $cinder_available              = true,
   $glance_available              = true,
@@ -415,4 +420,10 @@ be provided.')
     }
   }
 
+  if $sahara_available {
+    tempest_config {
+      'data-processing-feature-enabled/plugins': value => $sahara_plugins,
+    }
+  }
+
 }

spec/classes/tempest_spec.rb

@@ -103,6 +103,18 @@ describe 'tempest' do
       end
     end
 
+    context 'with sahara_plugins' do
+      let :params do
+        { :configure_images => false,
+          :sahara_available => true,
+          :sahara_plugins   => ['vanilla'] }
+      end
+
+      it 'properly configures Sahara plugins in tempest.conf' do
+        is_expected.to contain_tempest_config('data-processing-feature-enabled/plugins').with_value(['vanilla'])
+      end
+    end
+
     context 'with parameters' do
       let :params do
         { :configure_images    => true,