[packager] -native image generates all bundlers

This code should be changed:

                if (genPackages) {
                    deployParams.setBundleType(BundleType.NATIVE); <-- here
                    deployParams.validate();
                    packager.generateDeploymentPackages(deployParams);
                }

if "-native image" is passed in then BundleType.NATIVE is set and should remain. Fix that.