add secret: true to hec_token config_param such that it is redacted…

[conorevans]

Signed-off-by: Conor Evans coevans@tcd.ie

Proposed changes

Set secret parameter to true for the hec_token config_param. This will mask the output within the output of the configuration. The relevant fluentd code: https://github.com/fluent/fluentd/blob/5844f7209fec154a4e6807eb1bee6989d3f3297f/lib/fluent/config/element.rb#L160-L183

Types of changes

What types of changes does your code introduce?

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

Put an x in the boxes that apply.

• I have read the CONTRIBUTING doc
• I have read the CLA
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules

I didn't add a test because I didn't see a fitting way to add one. If you do, you can find an example in fluentd's core lib:https://github.com/fluent/fluentd/blob/5844f7209fec154a4e6807eb1bee6989d3f3297f/test/config/test_element.rb#L290