Issue3259-metaspace内存持续上涨

[LSL-cloud]

What this PR does / why we need it?

issue:#3259
metaspce内存持续上涨问题

fix pr:#3299
去除单测中误提交的sleep逻辑，导致单测卡住的问题

Summary of your change

Please indicate you've done the following:

• Made sure tests are passing and test coverage is added if needed.
• Made sure commit message follow the rule of Conventional Commits specification.
• Considered the docs impact and opened a new docs issue or PR with docs changes if needed.