docker: added waiting script for the mysql server
docker: added waiting script for the mysql server

pklink/Dingbat,pklink/machdas,pklink/machdas,agaripian/machdas,pklink/Dingbat,pklink/Dingbat,pklink/machdas,pklink/Dingbat,agaripian/machdas,agaripian/machdas,pklink/machdas,agaripian/machdas