gzip: no write data is actually gzipped

[powersj]

Steps to reproduce:

Create client with gzip enabled

        InfluxDBClient influxDBClient = inConn.buildConnection(url, token, bucket, org)
                .enableGzip();

Expected behavior:
On send, the data is not actually gzip'ed and the content-encoding states identity

Actual behavior:
On send, the data is gzip'ed and the content-encoding states gzip

Specifications:

• Client Version: latest
• InfluxDB Version: any
• JDK Version: any
• Platform: any