Grantinee creates users when no user is present for Mysql

[JohnBDonner]

We've noticed that when a user doesn't exist on a mysql database, when grantinee is run, it will create the user without a password and assign the permissions to it, despite error messages that "no user exists".

To reproduce:

• have no user in the database
• set permissions for the nonexistent user
• run grantinee
• look in the database: select user, host, authentication_string, password_last_changed from mysql.user;

You should see the previously non-existent user with an empty authentication_string value. If you run SHOW GRANTS FOR 'non_existent_user'@'host' then it will have all permissions defined by the Grantinee file.

Note: this was observed on a Grantinee client when running the dsl, engine and executor directly instead of through the CLI. Perhaps the user creation is prevented in the CLI class