## Description
- This PR fixes the MySql plugin server unit tests which started to fail
after increasing the max connection pool size from 5 to
[20](https://github.com/appsmithorg/appsmith/pull/36631/files). The
failures were due to the `Too Many Connections` error because of the
connections not getting closed.
- In this PR, I have added the code to close connections after each test
is executed.
Fixes#36656
## Automation
/ok-to-test tags="@tag.Sanity"
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!TIP]
> 🟢🟢🟢 All cypress tests have passed! 🎉🎉🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/11147034776>
> Commit: 3b9f5791cbd8d95f74f4a89ad204d1d4152445e0
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11147034776&attempt=2"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Sanity`
> Spec:
> <hr>Wed, 02 Oct 2024 16:20:15 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [ ] No
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
## Summary by CodeRabbit
- **Bug Fixes**
- Updated the expected default value for the maximum connection pool
size in tests to ensure accuracy.
- **Chores**
- Improved management of MySQL connection context to prevent resource
leaks in tests.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
---------
Co-authored-by: Manish Kumar <107841575+sondermanish@users.noreply.github.com>
25e83f6603