Add dependency on puppet-systemd

puppet-redis post [1] requires puppet-systemd,
this patch adds it.

[1] https://github.com/voxpupuli/puppet-redis/commit/ef7c4e60

Change-Id: Idbb70dfd397a4823369e33953a575bb1d9968522

Puppetfile-centos7

@@ -160,6 +160,10 @@ mod 'sysctl',
   :git => 'https://github.com/duritong/puppet-sysctl',
   :ref => 'v0.0.12'
 
+mod 'systemd',
+  :git => 'https://github.com/camptocamp/puppet-systemd',
+  :ref => 'master'
+
 mod 'vcsrepo',
   :git => 'https://github.com/puppetlabs/puppetlabs-vcsrepo',
   :ref => '2.3.0'

Puppetfile-centos8

@@ -160,6 +160,10 @@ mod 'sysctl',
   :git => 'https://github.com/duritong/puppet-sysctl',
   :ref => 'v0.0.12'
 
+mod 'systemd',
+  :git => 'https://github.com/camptocamp/puppet-systemd',
+  :ref => 'master'
+
 mod 'vcsrepo',
   :git => 'https://github.com/puppetlabs/puppetlabs-vcsrepo',
   :ref => '2.3.0'

packstack/plugins/puppet_950.py

@@ -153,7 +153,8 @@ def copy_puppet_modules(config, messages):
                            'openstacklib', 'oslo', 'ovn', 'packstack', 'panko',
                            'placement', 'rabbitmq', 'redis', 'remote', 'rsync',
                            'sahara', 'ssh', 'stdlib', 'swift', 'sysctl',
-                           'tempest', 'trove', 'vcsrepo', 'vswitch', 'xinetd'))
+                           'systemd', 'tempest', 'trove', 'vcsrepo',
+                           'vswitch', 'xinetd'))
 
     # write puppet manifest to disk
     manifestfiles.writeManifests()