Details
Description
Update database connection related versions:
HikariCP: 2.6.3 -> 3.1.0 (https://github.com/brettwooldridge/HikariCP/blob/dev/CHANGES)
mysql-connector-java: 5.1.43 -> 5.1.46 (https://dev.mysql.com/doc/relnotes/connector-j/5.1/en/news-5-1.html)
mariadb-java-client: 2.1.0 -> 2.2.5 (https://mariadb.com/kb/en/library/mariadb-connectorj-22-release-notes/)