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/constants.go

@@ -24,3 +24,7 @@ const (
 	FISSION_AUTH_TOKEN  = "FISSION_AUTH_TOKEN"
 	FISSION_STORAGE_URI = "/v1/archive"
 )
+
+const (
+	ENV_FUNCTION_NAMESPACE string = "FUNCTION_NAMESPACE"
+)