changed the check drive name(string)  to regexp
Merge branch 'ft_mysql' of github.com:globocom/database-as-a-service into ft_mysql
Merge branch 'ft_dashboard' of github.com:globocom/database-as-a-service into ft_mysql
Mysql not accept the same user
raise execption when the user already exists
Merge branch 'ft_mysql' of github.com:globocom/database-as-a-service into ft_mysql
enhancing engine api responde