net_response does not have a "success" field

[adrianlzt]

Relevant telegraf.conf:

[[inputs.net_response]]
  protocol = "tcp"
  address = "127.0.0.1:60013"

System info:

Telegraf 1.11.3

Steps to reproduce:

1. Run telegraf -test -config
2. Check the output

Expected behavior:

A field called success.

Or maybe better, remove that field from the docs, as result_code has more information.

Actual behavior:

> net_response,host=hostA,port=60013,protocol=tcp,result=connection_failed,server=127.0.0.1 result_code=2i,result_type="connection_failed" 1575377951000000000

Additional info:

[danielnelson]

So far as I can tell, this field never existed in a release version, it was added for 1.7.0 in #3455, but removed before release in 3ef28e3. I will remove it from the docs.

[danielnelson]

cc9a8cd