feat: agent test and bugfix

[ghkdqhrbals]

• Fix #50

Testing

• Multiple Agent test code
• Remove initClass (which is unused)
• Setup @TestContainer with parallel, beacuse of too many clients error which already explained in above issue
• JwtTokenProvider private method to public

Implement

• BM-Agent will publish their id, url, status to BM-Controller. And BM-Controller add their url and constantly check their health, status.
• Import com.adarshr.test-logger library to check delays of each tests (as seen below)

If the current test exceeds 1 second, a warning log will be displayed.

[github-actions[bot]]

📝 Test code-coverage reports

File	Coverage [86.5%]	:green_apple:
AgentServerManager.java	100%	:green_apple:
JwtTokenProvider.java	93.67%	:green_apple:
SseManageService.java	70.87%	:green_apple:
AgentListener.java	68.29%	:green_apple:

Total Project Coverage	77.33%	:green_apple: