[Aqara/Locks] Improvement of credential info management

[seojune79]

Check all that apply

Type of Change

• WWST Certification Request
  • If this is your first time contributing code:
    • I have reviewed the README.md file
    • I have reviewed the CODE_OF_CONDUCT.md file
    • I have signed the CLA
  • I plan on entering a WWST Certification Request or have entered a request through the WWST Certification console at developer.smartthings.com
• Bug fix
• New feature
• Refactor

Checklist

• I have performed a self-review of my code
• I have commented my code in hard-to-understand areas
• I have verified my changes by testing with a device or have communicated a plan for testing
• I am adding new behavior, such as adding a sub-driver, and have added and run new unit tests to cover the new behavior

Description of Change

Summary of Completed Tests

[github-actions]

Test Results

   71 files    480 suites   0s ⏱️
2 488 tests 2 488 ✅ 0 💤 0 ❌
4 270 runs  4 270 ✅ 0 💤 0 ❌

Results for commit d7d7b71.

[github-actions]

File	Coverage
All files	56%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/Aqara/aqara-lock/src/credential_utils.lua	65%	❌
/home/runner/work/SmartThingsEdgeDrivers/SmartThingsEdgeDrivers/drivers/Aqara/aqara-lock/src/init.lua	53%	❌

Minimum allowed coverage is 90%

Generated by 🐒 cobertura-action against d7d7b71