Reset mysql module to 3.0.1 tag

Undo all changes were made to mysql module since 3.0.1 release - it looks broken in develop branch
(err: Could not load downloaded file /var/lib/puppet/lib/puppet/type/database.rb: Could not autoload /var/lib/puppet/lib/puppet/provider/database/mysql.rb: /var/lib/puppet/lib/puppet/provider/database/mysql.rb:7: syntax error, unexpected '))