test job with old namespace support to ensure backward compatibility of fission (#2654)

* trigger test job to ensure backward compatibility
* update builder and function namespace in the CI test
* resolve namespace to show logs for fission-CLI
* export function-namespace variable
* Use a common script for an old and new test run
* Revert empty namespace values in the chart

Signed-off-by: Sanket Sudake <sanketsudake@gmail.com>
Co-authored-by: Sanket Sudake <sanketsudake@gmail.com>

pkg/fission-cli/util/util.go

@@ -55,6 +55,16 @@ func GetFissionNamespace() string {
 	return fissionNamespace
 }
 
+func ResolveFunctionNS(namespace string) string {
+	if namespace != metav1.NamespaceDefault {
+		return namespace
+	}
+	if len(os.Getenv(ENV_FUNCTION_NAMESPACE)) > 0 {
+		return os.Getenv(ENV_FUNCTION_NAMESPACE)
+	}
+	return namespace
+}
+
 func GetApplicationUrl(ctx context.Context, client cmd.Client, selector string) (string, error) {
 	var serverUrl string
 	// Use FISSION_URL env variable if set; otherwise, port-forward to controller.