Per the spec [1]:
configuration/ – automatically generated configuration reference
information based on oslo.config’s sphinx integration (or manually
written for projects not using oslo.config). Step-by-step guides for
doing things like enabling cells or configuring a specific driver
should be placed in the admin/ section.
Only the sample_config file fit into this category at present.
Let's add new sample_config file and move the configuration section to
this category.
Change-Id: I789fe53f4df9409dd6e4a6d5f9280feb65792258
Implements: blueprint designate-doc-migration
Partial-Bug: #1706173
3f1fe07d06