Description of problem:
Smart plugin could be configured via TripleO but doesn't work because CAP_SYS_RAWIO capability missing.


Version-Release number of selected component (if applicable):
Red Hat Openstack Platform 16.1 (RHOSP16.1)

How reproducible:
1. Configure YAML to have collecd with smart plugin
~~~
parameter_defaults:
    ExtraConfig:
      ceilometer::agent::polling::polling_interval: 5
      collectd::plugin::smart::disks: ['sda', 'sdb', 'sdc', 'sdd', 'sde']
      collectd::plugin::smart::ignoreselected: true
    EventPipelinePublishers:
      - gnocchi://?archive_policy=high
      - panko://
    CeilometerQdrPublishEvents: true
    CeilometerEnablePanko: true
    CollectdEnableLibpodstats: false
    PankoEventTTL: 604800
    MetricsQdrConnectors:
    - host: default-interconnect-5671-service-telemetry.apps.openshift-dev.ugent.be
      port: 443
      role: edge
      sslProfile: sslProfile
      verifyHostname: false
    CollectdExtraPlugins:
      - cgroups
      - smart
~~~

2. Deploy Openstack


Actual results:
The smart plugin is configured but through error for missing capability[1]

Expected results:
The smart plugin is configured

Additional info:
[1] 
collectd.log:
[2021-07-14 13:35:08] smart plugin: Running collectd as root, but the CAP_SYS_RAWIO capability is missing. The plugin's read function will probably fail. Is your init system dropping capabilities?
[2021-07-14 13:35:08] smart plugin: unable to open /dev/sda.