DNS record will be removed if MySQL connection fails or times out for a specific hostname #419

Job	Run time
run / test (mysql57, pymysql)	55m 35s
run / test (mysql57, mysqldb)	50m 32s
run / test (mysql57, asyncmy)	54m 10s
run / test (mysql57, mariadbconnector)	54m 37s
run / test (mysql80, pymysql)	27m 7s
run / test (mysql80, mysqldb)	24m 56s
run / test (mysql80, asyncmy)	25m 37s
run / test (mysql80, mariadbconnector)	32m 38s
run / test (mysql84, pymysql)	26m 43s
run / test (mysql84, mysqldb)	24m 24s
run / test (mysql84, asyncmy)	26m 18s
run / test (mysql84, mariadbconnector)	34m 13s
run / test (mysql90, pymysql)	28m 9s
run / test (mysql90, mysqldb)	24m 0s
run / test (mysql90, asyncmy)	24m 57s
run / test (mysql90, mariadbconnector)	31m 59s
run / summarize	7s
	9h 6m 2s

Provide feedback