Enhancing check for existing assets

[antirotor]

Problem

Changes introduced by #47 are checking if asset was already loaded to Unreal project so when you update etc. it will use existing location. This check is working on asset name as a string but it should use AYON metadata and full AYON path for that check because same named assets with different AYON path will break this check.

We should rather use AYON path stored on metadata than actual name.