Creates an empty init script override file if necessary

Without this patch, puppet runs were failing with the following error:

(/Stage[main]/Cinder::Volume::Rbd/File_line[set initscript env]) Could not
evaluate: No such file or directory - /etc/init/cinder-volume.override

Change-Id: Ibf42b4b09441c8a044f50af62246be31fe584e1b

manifests/volume/rbd.pp

@@ -52,6 +52,11 @@ class cinder::volume::rbd (
     }
   }
 
+  # Creates an empty file if it doesn't yet exist
+  file { $::cinder::params::ceph_init_override:
+    ensure  => present,
+  }
+
   file_line { 'set initscript env':
     line    => $override_line,
     path    => $::cinder::params::ceph_init_override,

spec/classes/cinder_volume_rbd_spec.rb

@@ -30,6 +30,9 @@ describe 'cinder::volume::rbd' do
         'test')
       should contain_cinder_config('DEFAULT/rbd_secret_uuid').with_value(
         '0123456789')
+      should contain_file('/etc/init/cinder-volume.override').with(
+        :ensure => 'present'
+      )
       should contain_file_line('set initscript env').with(
         :line    => /env CEPH_ARGS=\"--id test\"/,
         :path    => '/etc/init/cinder-volume.override',
@@ -47,6 +50,12 @@ describe 'cinder::volume::rbd' do
       req_params
     end
 
+    it 'should ensure that the cinder-volume sysconfig file is present' do
+      should contain_file('/etc/sysconfig/openstack-cinder-volume').with(
+        :ensure => 'present'
+      )
+    end
+
     it 'should configure RedHat init override' do
       should contain_file_line('set initscript env').with(
         :line    => /export CEPH_ARGS=\"--id test\"/,