test: add unicode test case for exec
This case will make the win32 failed when stdout include unicde string. I don't know how to fix it, but can make the bug be reproduced.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This case will make the win32 failed when stdout include unicde string. I don't know how to fix it, but can make the bug be reproduced.