Bug Fix: Enable legacy settings in new setting action

[chloe-zh]

Signed-off-by: Chloe Zhang chloezh1102@gmail.com

Description

Example 1:

PUT _opendistro/_sql/settings
{
  "transient" : {
    "opendistro.sql.enabled" : "false"
  }
}

Response:

#! Deprecation: [opendistro.ppl.enabled] setting was deprecated in OpenSearch and will be removed in a future release! See the breaking changes documentation for the next major version.
#! Deprecation: [opendistro.sql.enabled] setting was deprecated in OpenSearch and will be removed in a future release! See the breaking changes documentation for the next major version.
#! Deprecation: [PUT /_opendistro/_sql/settings] is deprecated! Use [PUT /_plugins/_query/settings] instead.
{
  "acknowledged" : true,
  "persistent" : { },
  "transient" : {
    "opendistro" : {
      "sql" : {
        "enabled" : "false"
      }
    }
  }
}

Example 2:

PUT _plugins/_query/settings
{
  "transient" : {
    "opendistro.ppl.enabled" : "false"
  }
}

Response:

#! Deprecation: [opendistro.sql.enabled] setting was deprecated in OpenSearch and will be removed in a future release! See the breaking changes documentation for the next major version.
#! Deprecation: [opendistro.ppl.enabled] setting was deprecated in OpenSearch and will be removed in a future release! See the breaking changes documentation for the next major version.
{
  "acknowledged" : true,
  "persistent" : { },
  "transient" : {
    "opendistro" : {
      "ppl" : {
        "enabled" : "false"
      }
    }
  }
}

Issues Resolved

#96

Check List

• New functionality includes testing.
  • All tests pass, including unit test, integration test and doctest
• New functionality has been documented.
  • New functionality has javadoc added
  • New functionality has user manual doc added
• Commits are signed per the DCO using --signoff

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[dai-chen]

Thanks for the fix!

[penghuo]

Thanks for the change!