[Core] Add Sol bindings for CLuaLootContainer class

[bope12]

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What does this pull request do?

Currently Listener "ITEM_DROPS" is unable to be used as the the second arg that is suppose to be the LootContainer is not being converted resulting in the error "attempt to index local 'loot' (a userdata value)"
This PR re adds the sol binding for LootContainer to CLuaLootContainer

Steps to test these changes

Add a Listener "ITEM_DROPS" to a mob
Kill mob
No error in the script and items added via the listener can be rolled