Add AFS and Admin keytab to release slave.

This patch adds AFS, and the admin keytab, to our release slave,
so that we may execute `vos release` when a mirror update
is requested.

Change-Id: I9c8531304fb74b9bafca85d58b5e9c1c0bc21f6a

manifests/site.pp

@@ -895,6 +895,7 @@ node 'release.slave.openstack.org' {
     npm_username           => 'openstackci',
     npm_userpassword       => hiera('npm_user_password'),
     npm_userurl            => 'https://openstack.org',
+    admin_keytab           => hiera('afsadmin_keytab'),
   }
 }
 

modules/openstack_project/manifests/release_slave.pp

@@ -31,12 +31,21 @@ class openstack_project::release_slave (
   $npm_username,
   $npm_userpassword,
   $npm_userurl,
+  $admin_keytab = '',
 ) {
   class { 'openstack_project::slave':
     ssh_key             => $jenkins_ssh_public_key,
     jenkins_gitfullname => $jenkins_gitfullname,
     jenkins_gitemail    => $jenkins_gitemail,
     project_config_repo => $project_config_repo,
+    afs                 => true,
+  }
+
+  file { '/etc/afsadmin.keytab':
+    owner   => 'root',
+    group   => 'root',
+    mode    => '0400',
+    content => $admin_keytab,
   }
 
   package { 'twine':