dbdeployer 1.19.0

Introduce flavors, capabilities, and support for TiDB

• Implement Issue #49 Add support for --client-from=X
• Implement Issue #50 Change evaluation of version to include a flavor
• Fix Issue #51 unpack command fails when tarball name doesn't include a version
• Implement Issue #52 unpack command should create a FLAVOR file for the extracted tarball
• Add command "dbdeployer admin capabilities [flavor [version]]"
• Ensure tiDB binaries are recognized as valid.
• Look for mysql_install_db only when flavor + version need it.
• Fix Go native tests to use flavor and client basedir.
• Code formatting.
• Add tiDB templates
• update .gitignore and improve main test script
• Add use template, fixed bug in CONTRIBUTING
• fix bug in add_option filename
• Add fix to kill script
• Add check for template name uniqueness
• Add check for tidb template names to use a known prefix
• Add check to prevent replication with tidb flavor
• Add flavor detection based on files in expanded tarball
• Fix unpack panic when top directory not in tarball
• Add tests for TiDB, flavor detection, capabilities
• Fix Issue #48 MySQLx and group replication
• Fix Issue #48 "can't enable mysqlx and group replication at the same time"
• Add new script and better flavor support
• Change "remote get" docs to reflect changed names
• Fix Issue #62 TiDB fails on MacOS
• Add script "after_start" to sandboxes (does nothing by default, but it is used by TiDB to clean-up unwanted scripts)
• Add pidfile support for TiDB (#64)
• Change tiDB use and status to use regular template
• Fix other templates to return compatible error codes and messages
• Improve Travis test execution flow
• Fix mock tests for TiDB
• Add functional tests for TiDB