Fix "method_complexity" issue in Sources/AssetLib/Controllers/TemplateResultParser.swift

[leogdion]

Function template has a Cognitive Complexity of 7 (exceeds 5 allowed). Consider refactoring.

https://codeclimate.com/github/brightdigit/AssetLib/Sources/AssetLib/Controllers/TemplateResultParser.swift#issue_5e7e108a62c6af00010000cc