Elasticsearch compatibility

[zhangtong007]

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Describe the bug:

Elasticsearch in versions 7.x and above no longer supports setting the doc type field. The field is unified as '_doc'.

Expected behavior:

review the code and change the index that is not of type _doc to type _doc
delete all the code that calls the Type api in the es client. versions above 7.x use _doc as the type by default

Additional

such as:

Lunettes version

No response

Kubernetes version

No response