Fix TestYamls for change in ko create

With ko-build/ko#750, which we picked up when we bumped `ko` to `v0.12.0` in the test-runner image, `-n (namespace)` is no longer an argument for `ko create`. So we need to ensure that the namespace for the `TestYamls` CRDs is actually set properly, and get rid of the `-n (namespace)` from our invocation of `ko create`.

Signed-off-by: Andrew Bayer <andrew.bayer@gmail.com>

test/examples_test.go

@@ -77,8 +77,7 @@ func substituteEnv(input []byte, namespace string) ([]byte, error) {
  }
  output := defaultKoDockerRepoRE.ReplaceAll(input, []byte(val))
 
- // Strip any "namespace: default"s, all resources will be created in
- // the test namespace using `ko create -n`
+ // Replace any "namespace: default"s with the test namespace.
  output = defaultNamespaceRE.ReplaceAll(output, []byte("namespace: "+namespace))
 
  // Replace image names to arch specific ones, where it's necessary
@@ -91,7 +90,7 @@ func substituteEnv(input []byte, namespace string) ([]byte, error) {
 // koCreate wraps the ko binary and invokes `ko create` for input within
 // namespace
 func koCreate(input []byte, namespace string) ([]byte, error) {
- cmd := exec.Command("ko", "create", "--platform", "linux/"+getTestArch(), "-n", namespace, "-f", "-")
+ cmd := exec.Command("ko", "create", "--platform", "linux/"+getTestArch(), "-f", "-", "--namespace", namespace)
  cmd.Stdin = bytes.NewReader(input)
  return cmd.CombinedOutput()
 }