suppress soup update output for cleaner console

salt/manager/tools/sbin/soup

@@ -892,17 +892,17 @@ main() {
   echo ""
   require_manager
 
-  check_pillar_items
+  check_pillar_items > /dev/null
 
   echo "Checking to see if this is an airgap install."
   echo ""
-  check_airgap
+  check_airgap > /dev/null
   if [[ $is_airgap -eq 0 && $UNATTENDED == true && -z $ISOLOC ]]; then
     echo "Missing file argument (-f <FILENAME>) for unattended airgap upgrade."
     exit 0
   fi
 
-  set_minionid
+  set_minionid > /dev/null
   echo "Found that Security Onion $INSTALLEDVERSION is currently installed."
   echo ""
   if [[ $is_airgap -eq 0 ]]; then