Integration Test Tracking: Vault Module

[vuong177]

Description

This issue tracks the progress and tasks related to the integration tests for the Vault module ## Tasks

Vault Features

• Implement test for CreateVault
• Implement test for Deposit
• Implement test for Withdraw
• Implement test for Mint
• Implement test for Repay
• Implement tests for GetVault and GetVault functions
• Add/remove allowed deposit token
• Implement tests for VaultsManager, Vaults collections

Liquidate Features

Implement tests for liquidation logic (details to be specified)

BeginBlocker

• Implement test for UpdateVaultsDebt in BeginBlocker