Suppress salt-call INFO message so Galera test works

Change-Id: I1bcbbc23f3c1f3e122acc04d1df576b92061fffa
Closes-bug: PROD-20753
diff --git a/cloud-update.groovy b/cloud-update.groovy
index f70f454..fd7e6ff 100644
--- a/cloud-update.groovy
+++ b/cloud-update.groovy
@@ -724,7 +724,7 @@
     def out
     while(count < maxRetries) {
         try {
-            out = salt.getReturnValues(salt.cmdRun(pepperEnv, target, 'salt-call mysql.status | grep -A1 wsrep_cluster_size'))
+            out = salt.getReturnValues(salt.cmdRun(pepperEnv, target, 'salt-call -l quiet mysql.status | grep -A1 wsrep_cluster_size'))
         } catch (Exception er) {
             common.infoMsg(er)
         }