Fix nested container tests

[shahabi8]

Change Description

This PR fixes nested container tests for pair and map containers.
Map can be defined through key and value like this: [{"key":10, "value":100],{"key":10, "value":100}]
Pair can be defined through first and second like this: ["first":30, "second":{"first":301, "second":302}]

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Testing Changes

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[plroblox]

Excellent ! map should go with key-value whereas pair should go-with firt-second regarding the JSON input formats of typess involving map/pair