Add EXTRA_FORMULAS in cookiecutter testing

Change-Id: I000fed00fda0ac857a313c8f9748cbdfe975e138
diff --git a/test-cookiecutter-reclass.groovy b/test-cookiecutter-reclass.groovy
index b1e9d2f..693c4b0 100644
--- a/test-cookiecutter-reclass.groovy
+++ b/test-cookiecutter-reclass.groovy
@@ -61,7 +61,7 @@
     def templateContext = readYaml text: content
     def clusterDomain = templateContext.default_context.cluster_domain
     git.checkoutGitRepository("${testEnv}/classes/system", RECLASS_MODEL_URL, RECLASS_MODEL_BRANCH, CREDENTIALS_ID)
-    saltModelTesting.setupAndTestNode("cfg01.${clusterDomain}", "", testEnv)
+    saltModelTesting.setupAndTestNode("cfg01.${clusterDomain}", EXTRA_FORMULAS, testEnv)
 }
 
 def gerritRef