Fix issue 25 about logstash pipeline settings type

[disaster37]

Signed-off-by: disaster37 [email protected]

Fix issue #25

Logstash pipeline settings is now a TypeSet with a defined list of items instead a string map.
It indroduce a breaking change that you need to hendle on terraform state ...

On Terraform code, you need to move

resource kibana_logstash_pipeline "test" {
    name = "terraform-test"
    description = "test"
    pipeline = "input { stdin{} } output { stdout{} }"
    settings = {
      "pipeline.workers" = "6"
      "queue.type" = "persisted"
    }
}

To

resource kibana_logstash_pipeline "test" {
    name = "terraform-test"
    description = "test"
    pipeline = "input { stdin{} } output { stdout{} }"
    settings {
      pipeline_workers = 6
      queue_type = "persisted"
    }
}