Knative Trigger creation is only based on event type attribute

[matzew]

Requirement

Creating a trigger is currently limited to just the event type. No other CloudEvent attributes or even extensions are being considered here:

camel-k/pkg/util/knative/knative.go

Lines 103 to 105 in 349dd37

	attributes = map[string]string{
	"type": eventType,
	}

Problem

Only triggers with event type are possible

Proposal

make usage of othr attributes / extensions

Open questions

No response