Fix typo in Pepper related changes

- Fix typo in changes which inforcing to use Pepper
  instead of direct http requests.

Change-Id: I34a689d8c89b68b8a5cfa77a96bdfb2a1132d7f6
Closes-Bug: PROD-15207
diff --git a/validate-cloud.groovy b/validate-cloud.groovy
index 9e13f7c..10441c2 100644
--- a/validate-cloud.groovy
+++ b/validate-cloud.groovy
@@ -39,7 +39,7 @@
 node() {
     try{
         stage('Setup virtualenv for Pepper') {
-            python.setupPepperVirtualenv(venvPepper, SALT_MASTER_URL, SALT_MASTER_CREDENTIALS)
+            python.setupPepperVirtualenv(pepperEnv, SALT_MASTER_URL, SALT_MASTER_CREDENTIALS)
         }
 
         stage('Configure') {