Optionally manage splunk user/group

[nick-markowski]

Bug: Changing the splunk user from the default (root on Linux) to another user will result in failures when the config files are ensured.

To reproduce, set splunk::params::splunk_user: 'splunk' #or any group/user for this matter

Fix: We should optionally manage the splunk user/group and default management to false:

params.pp:

Boolean $manage_splunk_user                = false,

install.pp:

if $splunk::enterprise::manage_splunk_user {
    group { $splunk::enterprise::splunk_user:
      ensure  => 'present',
      require =>  Package[$splunk::enterprise::enterprise_package_name],
    }
    user { $splunk::enterprise::splunk_user:
      ensure  => 'present',
      require =>  Group[$splunk::enterprise::splunk_user],
    }
  }

I can have a PR staged in short order

[nick-markowski]

I'll re-open if/when I can better define the need for this.