Precreate neutron related directories

Puppet type `override_resources' changed its behaviour to the following:
it creates resources that are defined in `configuration' value of hiera.
This breaks current plugin deployment following way: plugin overrides
`configuration' in its own `/etc/hiera/plugins/opendaylight.yaml` file.
`override_resource' gets called before `neutron' package gets installed
it tries to write values from opendaylight.yaml to directories that are
missing (`neutron-server' package is not installed).

Change-Id: I8ccb4bfe8e788cd171bafde125903d91aa31b59e
Partial-bug: #1648349

deployment_scripts/puppet/modules/opendaylight/manifests/hiera_override.pp

@@ -14,4 +14,12 @@ class opendaylight::hiera_override {
     $network_scheme,
     hiera('management_vip')
   )
+
+  $neutron_dirs = [ '/etc/neutron/', '/etc/neutron/plugins', '/etc/neutron/plugins/ml2' ]
+  file { $neutron_dirs:
+    ensure => directory,
+    owner  => root,
+    group  => root,
+    mode   => 0644,
+  }
 }