Failed to create virtual server : SQL select password from user where user = 'int' failed : Unknown column 'password' in 'field list'
MySQL 5.7 does not contain a "password" field in "mysql.users" to "authentication_string".
Likely this will have to be a configuration variable somewhere so that pre-MySQL 5.7 still uses "password" but MySQL 5.7+ uses "authentication_string".
With any luck this is the last of the changes. On a side note: IMO the MySQL dev really should not have made a change like this until a major release like 6.x.