Monitoring MySQL 8 / mysql_native_password being deprecated

Thanks for the suggestion!

This will work in a pinch if mysql_native_password should be deleted before F5 provides and update.  I tested this in the lab and was able to create a viable montior using bash and the mysql client that was in the mysql8 tar file.

Full disclosure.  Previously, I was using an external monitor using perl and that doesn't work.   

Hopefully, F5 will provide an update so that maintaining this configuration isn't necessary.