Install neutron-plugin-ml2 package on Ubuntu

While there is no dedicated package for neutron-plugin-ml2 on Debian,
there is one on Ubuntu operating systems.

We should install it when ML2 core plugin is enabled.

Closes-bug: #1337988
Change-Id: I8ee2bca21cc3f32c017529b55c92a50094aa25d5

manifests/params.pp

@@ -57,7 +57,11 @@
     $server_service     = 'neutron-server'
     $client_package     = 'python-neutronclient'
 
-    $ml2_server_package = false
+    if $::operatingsystem == 'Ubuntu' {
+      $ml2_server_package = 'neutron-plugin-ml2'
+    } else {
+      $ml2_server_package = false
+    }
 
     $ovs_agent_package   = 'neutron-plugin-openvswitch-agent'
     $ovs_agent_service   = 'neutron-plugin-openvswitch-agent'

spec/classes/neutron_plugins_ml2_spec.rb

@@ -212,7 +212,22 @@
       {}
     end
 
-    it_configures 'neutron plugin ml2'
+    context 'on Ubuntu operating systems' do
+      before do
+        facts.merge!({:operatingsystem => 'Ubuntu'})
+        platform_params.merge!(:ml2_server_package => 'neutron-plugin-ml2')
+      end
+
+      it_configures 'neutron plugin ml2'
+    end
+
+    context 'on non-Ubuntu operating systems' do
+      before do
+        facts.merge!({:operatingsystem => 'Debian'})
+      end
+
+      it_configures 'neutron plugin ml2'
+    end
   end
 
   context 'on RedHat platforms' do