Fluentd not configured because there is no fluentd user

[Juan Badia Payno]

Description:

I tried to install & configured the logging environment.
The overcloud was created, however the fluentd client was not running on the overcloud.
Looked deeper, the fluentd client was not even configured.

branch: master-tripleo-ci

Steps to reproduce the bug:
(undercloud) [stack@undercloud ~]$ ./overcloud-deploy.sh -e /home/stack/tripleo-heat-templates/environments/logging-environment.yaml -e /home/stack/tripleo-heat-templates/environments/monitoring-environment.yaml -e /home/stack/tripleo-heat-templates/environments/collectd-environment.yaml -e /home/stack/params.yaml

$cat params.yaml
---
parameter_defaults:
  LoggingServers:
    - host: 192.168.1.52
      port: 24224
  MonitoringRabbitHost: 192.168.1.52
  MonitoringRabbitUserName: sensu
  MonitoringRabbitPassword: sensu
  CollectdServer: 192.168.1.52
  CollectdSecurityLevel: None

The following errors could be seen on the deployment logs, the errros were found at /var/lib/heat-config/deployed/b31f9711-c929-4e58-92d5-00b0e211879a.notify.json on the overcloud controller:

 \"Error: Could not set 'directory' on ensure: Could not find user fluentd at /etc/puppet/modules/fluentd/manifests/install.pp:10\",
        \"Wrapped exception:\",
        \"Could not find user fluentd\",
        \"Error: /Stage[main]/Fluentd::Install/File[/etc/fluentd/config.d]/ensure: change from absent to directory failed: Could not set 'directory' on ensure: Could not find user fluentd at /etc/puppet/modules/fluentd/manifests/install.pp:10\",
        \"Warning: /Stage[main]/Fluentd::Install/File[/etc/fluentd/fluent.conf]: Skipping because of failed dependencies\",
        \"Error: Could not set 'directory' on ensure: Could not find user fluentd at /etc/puppet/modules/tripleo/manifests/profile/base/logging/fluentd.pp:88\",
        \"Error: /Stage[main]/Tripleo::Profile::Base::Logging::Fluentd/File[/var/cache/fluentd]/ensure: change from absent to directory failed: Could not set 'directory' on ensure: Could not find user fluentd at /etc/puppet/modules/tripleo/manifests/profile/base/logging/fluentd.pp:88\",