kill any possible queued salt jobs before stopping salt-master

salt/common/tools/sbin/soup

@@ -474,6 +474,9 @@ stop_salt_master() {
     echo ""
     echo "Killing all Salt jobs across the grid."
     salt \* saltutil.kill_all_jobs
+    echo ""
+    echo "Killing any queued Salt jobs on the manager."
+    pkill -9 -ef "/usr/bin/python3 /bin/salt"
     set -e
 
     echo ""