Changes for version 3.0.62
- Added default name for relay log files.
- Added 'show_binlog' script in each sandbox
- improved tests by getting all the version components from a single function call
- Added GTID initialization options for MySQL 5.6, 5.7, and MariaDB 10
- Added GTID enabling test for MySQL 5.6 and 5.7
- added and improved more tests