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.