Modified Shutdown using systemd after Bootstrap to provide additional messaging

This is Ubuntu 16.04 and PXC 5.7:

 

As you can see below after bootstrap I do "service mysql stop"  it looks successful however when I try to connect to the server I see it was not shut down

 

Expected Outcome:   Either success shutting it down or some clear error message to indicate the shutdown could not be performed

 

 

root@nuc1:~# service mysql bootstrap-pxc

• Bootstrapping Percona XtraDB Cluster database server mysqld [ OK ]
  root@nuc1:~# service mysql stop
  root@nuc1:~# mysql
  Welcome to the MySQL monitor. Commands end with ; or \g.
  Your MySQL connection id is 221
  Server version: 5.7.22-22-57-log Percona XtraDB Cluster (GPL), Release rel22, Revision da86071, WSREP version 29.26, wsrep_29.26

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mysql> quit