Use the same go test command for testing locally or on Prow (#120)
Use the same go test command for testing locally or on Prow (#120)

Until now, local runs would have slightly different command line parameters.
This change will make the execution consistent between the environments, and also allow further experimentation on e2e tests, like testing the `-emit-metrics` flag locally.
knative/test-infra,knative/test-infra,knative/test-infra