fix: remove Content-Encoding=Identity as the header as it violates the RFC (influxdata#595)

Author: tj---

Diff for: CHANGELOG.md

@@ -29,6 +29,7 @@ This release introduces a support for new version of InfluxDB API definitions wi
 ### Bug Fixes
 1. [#583](https://github.com/influxdata/influxdb-client-python/pull/583): Async HTTP client doesn't always use `HTTP_PROXY`/`HTTPS_PROXY` environment variables. [async/await]
 1. [#584](https://github.com/influxdata/influxdb-client-python/pull/584): Parsing empty query result value as `numpy.NaN`
+1. [#595](https://github.com/influxdata/influxdb-client-python/pull/595): The `Config-Encoding: identity` header will no longer be set by the `write_api` calls to a remote server
 
 ## 1.36.1 [2023-02-23]
 

Diff for: influxdb_client/client/write_api.py

@@ -507,7 +507,7 @@ def _retry_callback_delegate(exception):
     def _post_write(self, _async_req, bucket, org, body, precision, **kwargs):
 
         return self._write_service.post_write(org=org, bucket=bucket, body=body, precision=precision,
-                                              async_req=_async_req, content_encoding="identity",
+                                              async_req=_async_req,
                                               content_type="text/plain; charset=utf-8",
                                               **kwargs)
 

Diff for: influxdb_client/client/write_api_async.py

@@ -120,6 +120,6 @@ async def write(self, bucket: str, org: str = None,
         body = b'\n'.join(payloads[write_precision])
         response = await self._write_service.post_write_async(org=org, bucket=bucket, body=body,
                                                               precision=write_precision, async_req=False,
-                                                              content_encoding="identity", _return_http_data_only=False,
+                                                              _return_http_data_only=False,
                                                               content_type="text/plain; charset=utf-8")
         return response[1] == 204

Diff for: tests/test_gzip.py

@@ -60,7 +60,6 @@ def test_gzip_disabled(self):
         self.assertEqual("identity", _requests[0].headers['Accept-Encoding'])
         # Write
         self.assertEqual("/api/v2/write?org=my-org&bucket=my-bucket&precision=ns", _requests[1].path)
-        self.assertEqual("identity", _requests[1].headers['Content-Encoding'])
         self.assertEqual("identity", _requests[1].headers['Accept-Encoding'])
         self.assertEqual("h2o_feet,location=coyote_creek water_level=1 1", _requests[1].parsed_body)
         # Query