SqlDatabaseUser: New resource

[bozho]

xSQLServerDatabaseRole currently handles DB user creation and role assignment (for already existing roles)

The name is a bit confusing, since the name implies the resource actually handles DB roles creation/removal.

I suggest we rename xSQLServerDatabaseRole to XSQLServerDatabaseUser.

The new resource xSQLServerDatabaseRole would then handle DB roles.

[johlju]

I agree to rename this resource, and change so that this resource only handles creation and dropping of database user.

This must be merged at the same time (or close to the same time) as the issue #847 is merged.

[johlju]

Practically, to be able to create a PR for this issue and issue #847, I think it would be best to not rename this resource but instead, if it helps, copy the code from the xSQLServerDatabaseRole to the new resource xSQLServerDatabaseUser and change the code there. This will make it possible to change to xSQLServerDatabaseRole without merge conflicts.