Make cleanoutserver step mandatory in drain documentation.

[neunhoef]

Internal Ref:

• https://github.com/arangodb/planning/issues/3733

[Simran-B]

What is this sentence supposed to say?

(please compare the above output of the /_admin/cluster/health API).

compare above output to the output of ... ?

Does the format follow the one of the cluster health API, or should the user check if both report the same things?

[sleto-it]

@Simran-B to reply to your question:

I believe here we are asking the following:

• we are asking to call /_admin/cluster/cleanOutServer, and we have to pass to this call a json document with the name of the dbserver to be clened-out . In our example {"server":"DBServer0006"}

• "(please compare the above output of the /_admin/cluster/health API)" I believe means the following: we are saying to the user that this "DBServer0006" is not a name we invented - it is the one we get as "ShortName" of DBserver from the /_admin/cluster/health

I believe this was the meaning - please could you reward and make it more clear?
Does this answer? so we merge and publish

thanks