luis:build turns all labels into ml even if defined as composite in another file

[chrimc62]

Describe the bug

File1:
@ list blah=

• something:

@ composite foo = [blah]

File2:

utterances

• @{foo= something}

File3:
Include both File1 and File2

Try to do luis:build on file3.

You will get an error: Entity names must be unique. Duplicate definition found for "foo". Prior definition - '@ ml foo'

The reason is that the collator on file 2 ends up assuming foo is an ml entity which conflicts with its definition as a composite.

Expected behavior

You can distribute definitions including labeling.

[bug]