Llama+TraderLlama Fix & ExprSpawnerType

[Absolutionism]

Problem

Since Bukkit's EntityType has a value for both LLAMA and TRADER_LLAMA by having both of these types being handled/combined in the same EntityData class, lead to some unsavory issues (linked issue).

Solution

Updates LlamaData, #init, #IsSuperOf, #match and removes the checks for the TraderLlama.class

Note: I did update ExprSpawnerType because the linked issue mentioned the spawner specifically, so I was at that class first.
Updates to current code+doc conventions, and adds DELETE changemode

Testing Completed

7951-llama and trader llama.sk

Supporting Information

N/A

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Completes: #5439
Related: none