chore: implement change visibility with configuration (#74)

Author: luismayta

provision/generators/plop/templates/test.add.hbs

@@ -18,7 +18,7 @@ func Test{{pascalCase testName}}Success(t *testing.T) {
 
 	repository := faker.Repository().Name()
 	description := faker.Repository().Description()
-	visibility := faker.Repository().Visibility()
+	visibility := config.VisibilityPublic
 	logger.Debugf(
 		"values for test terraform-github-repository is",
 		"repository", repository,