Update send_produce_error to decode failed_messages with built-in decoder.

[DeeChau]

Description

Fixes #19 - Update send_produce_error to decode failed_messages with built-in decoder.

Type of change

Please delete options that are not relevant.

• [x] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Tested on a staging environment of fadmin. Metrics show up in datadog tracking when errors happen during the delivery of messages to kafka. i.e

Failed to send all messages to multi.Flyers.FlyerDataResponse/2; attempting retry 1 of 10 after 5s
Failed to fetch metadata from kafka://kafka-stg.bootstrap.wishabi.net:9093: Connection error Errno::ETIMEDOUT: Connection timed out

Checklist:

• [x] My code follows the style guidelines of this project
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works
• [x] New and existing unit tests pass locally with my changes
• [x] Any dependent changes have been merged and published in downstream modules

[DeeChau]

Addressed comments and tested on a staging environment. Metrics show up in datadog tracking when errors happen during the delivery of messages to kafka. e.g.

Failed to send all messages to multi.Flyers.FlyerDataResponse/2; attempting retry 1 of 10 after 5s
Failed to fetch metadata from kafka://kafka-stg.bootstrap.wishabi.net:9093: Connection error Errno::ETIMEDOUT: Connection timed out

have corresponding metrics in received.

CloudWatch Logs Insights
region: us-east-1
log-group-names: fadmin-multi
start-time: 2020-08-04T18:31:31.000Z
end-time: 2020-08-04T20:50:23.000Z
query-string:

filter @message LIKE /Failed to send all messages to/ 
| filter @message LIKE /keeping remaining messages in buffer/
| sort @timestamp desc
| parse '[7150]: Failed to send all messages to */' as topic
| stats count() by topic

---

topic	count()
multi.Flyers.FlyerFsas	12
multi.Flyers.FlyerDataResponse	10
multi.fadmin_flyers	8

---

[DeeChau]

@dorner Made the changes!

[dorner]

Nice, thanks!