WIP:Set object lock for volumes for cephfs encryption

[Sunnatillo]

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[nixpanic]

just a nit to improve the readability of the code a little, looks quite good already

[nixpanic]

Usually we write code in a way that handles errors or unexpected results, and bails out, only when everything succeeds it continues in the function.

if !created {
    return fmt.Errorf("There is already one file system with name %s", string(volID))
}

defer func() {
...