[MariaDB Packagers] MariaDB 10.3.16 and 10.2.25 release prep

Prep work for the MariaDB 10.3.16 and 10.2.25 releases has begun. Expected release date is Mon, 17 Jun 2019. Draft release notes and changelog for MariaDB 10.3.16: - https://mariadb.com/kb/en/mdb-10316-rn/ - https://mariadb.com/kb/en/mdb-10316-cl/ Draft release notes and changelog for MariaDB 10.2.25: - https://mariadb.com/kb/en/mdb-10225-rn/ - https://mariadb.com/kb/en/mdb-10225-cl/ As usual, the release notes and changelogs are still in draft form at this time and will be updated prior to release. Thanks. -- Daniel Bartholomew, MariaDB Release Manager MariaDB | https://mariadb.com