Hierarchy Structure is lost in imported terms when names are repeated

[mrfoxtalbot]

When importing terms for a hierarchical taxonomy, the parent-child structure will be lost if names are repeated.

Below is an example of this (in brackets, the slug)

– Computers (computers)
– – Software (software)
– – – Audio (audio)
– – – Video (video)
– Phones (phones)
– – Software (software-2)
– – – Audio (audio-2)
– – – Video (video-2)

How to reproduce:

1. Create several nested categories.
2. Ensure some of the child terms hace the same name
3. Export
4. Import
5. Notice how all terms are imported as "top level" ones.