host-metering client  design says:

In label_refresh_interval it loads labels

Goal: 

• Implement the feature so that host-metering client can reflect labels e.g. if host certs were not change but e.g. host usage or support was.

Acceptance Criteria:

• Feature is implemented
• Feature is covered with unit tests that don't slow down the test suite much

Notes:

• the config option already exist https://github.com/RedHatInsights/host-metering/blob/b50fe0e380aead3ef0a9ab6f65410d59de79b95b/config/config.go#L54 and is even documented in man page.
• could be handled in daemon run method: https://github.com/RedHatInsights/host-metering/blob/main/daemon/daemon.go#L48