fix libvirtd service naming and env file for debian

Change-Id: I6a69e3ad43936d032ac252d8a6c9a1d2bc78bfbd

metadata.rb

@@ -6,7 +6,7 @@ source_url 'https://github.com/openstack/cookbook-openstack-compute' if respond_
 license 'Apache 2.0'
 description 'The OpenStack Compute service Nova.'
 long_description IO.read(File.join(File.dirname(__FILE__), 'README.md'))
-version '15.2.0'
+version '15.2.1'
 chef_version '>= 12.5' if respond_to?(:chef_version)
 
 %w(ubuntu redhat centos).each do |os|

recipes/libvirt.rb

@@ -136,7 +136,11 @@ template '/etc/libvirt/libvirtd.conf' do
   notifies :restart, 'service[libvirt-bin]', :immediately
 end
 
-template '/etc/default/libvirt-bin' do
+# The package libvirt-bin on debian now provides the service libvirtd
+# (libvirt-bin is still defined as an alias) and reads its environment from
+# /etc/libvirt/libvirtd instead of the previously used
+# /etc/default/libvirt-bin.
+template '/etc/default/libvirtd' do
   source 'libvirt-bin.erb'
   owner 'root'
   group 'root'

spec/libvirt_spec.rb

@@ -81,10 +81,10 @@ describe 'openstack-compute::libvirt' do
       end
     end
 
-    describe '/etc/default/libvirt-bin' do
-      let(:file) { chef_run.template('/etc/default/libvirt-bin') }
+    describe '/etc/default/libvirtd' do
+      let(:file) { chef_run.template('/etc/default/libvirtd') }
 
-      it 'creates the /etc/default/libvirt-bin file' do
+      it 'creates the /etc/default/libvirtd file' do
         expect(chef_run).to create_template(file.name).with(
           owner: 'root',
           group: 'root',