idl: imports bug

[ratoshniuk]

while importing two items with the same name, IDL applies the last one instead of throwing an error about imported two items with the same name

import foo.bar1.{
    Item
}

import foo.bar2.{
    Item
}

after compilation, you will be able to work with foo.bar2.Item

Purpose:

throw an error when you fill find multiple items with the last name in a same domain instead overwriting