Adding check for -1 status code for the default retry impl

[matzew]

Signed-off-by: Matthias Wessendorf mwessend@redhat.com

Fixes #

Proposed Changes

• Adding a try if the statusCode is -1, similar to the new alternative/approach

Release Note

We now do a retry if we have a -1 statusCode

Docs

[matzew]

/assign @slinkydeveloper

[codecov]

Codecov Report

Merging #4897 (9ebe809) into master (403aefa) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master    #4897   +/-   ##
=======================================
  Coverage   81.14%   81.14%           
=======================================
  Files         294      294           
  Lines        8383     8383           
=======================================
  Hits         6802     6802           
  Misses       1175     1175           
  Partials      406      406           

Impacted Files	Coverage Δ
pkg/kncloudevents/message_sender.go	82.25% <100.00%> (ø)

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[slinkydeveloper]

/lgtm
/approve

[knative-prow-robot]

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