Validate Event Body for Json Format

[khrm]

Throw the Error Message and Bad Request Code if event Body isn't JSON.
Fixes: #656

Changes

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Release Notes

We throw http.BadRequest status code(400) if event payload isn't json.

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-triggers-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/sink/validate_payload.go	Do not exist	0.0%

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-triggers-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/sink/validate_payload.go	Do not exist	77.8%

[khrm]

/hold

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-triggers-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/sink/validate_payload.go	Do not exist	77.8%

[tekton-robot]

The following is the coverage report on the affected files.
Say /test pull-tekton-triggers-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/sink/validate_payload.go	Do not exist	77.8%

[dibyom]

/approve
/lgtm

[tekton-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: dibyom

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[dibyom]

eventlistener_test.go:334: EventListener is ready
eventlistener_test.go:449: sink did not return 2xx response. Got status code: 500
eventlistener_test.go:457: failed to read/decode sink response: EOF

Hmmm looks like the integration test failures are not flakes

/hold

[khrm]

/test pull-tekton-triggers-integration-tests

[khrm]

/test pull-tekton-triggers-integration-tests

[khrm]

@dibyom I can't recreate locally. Here also it passed when I reran.

[dibyom]

/hold cancel