Add conformance test to verify Configuration metadata updates do not result in new Revision (#2259)
Add conformance test to verify Configuration metadata updates do not result in new Revision (#2259)

* [2070] add test to verify config metadata updates do not result in new revision

* [2070] Some changes based on PR review

* [2070] compare the Generation against the ObservedGeneration in the status

knative/serving,knative/serving