This updates admin documentation for the Redfish-based manual
clean step `set_bmc_clock` and automated `verify_bmc_clock`.
- Updates the cleaning.rst with an example of using `set_bmc_clock`.
- Adds a section to the steps.rst for the `verify_bmc_clock`.
- Explains how to enable the verify step using the
`enable_verify_bmc_clock` config option under `[redfish]`.
Change-Id: Ied7fa289178510ccb0ceaa790fe8d89ed7e481b6
Signed-off-by: Queensly Kyerewaa Acheampongmaa <qacheampong@gmail.com>
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