[jdbc-v2] Fixed tests

[chernser]

Summary

Fixed the test so:

• only explicit https is valid
• no ssl property should require - user should specify secure protocol (may be we need to make it by default https)

Checklist

Delete items not relevant to your PR:

• Unit and integration tests covering the common scenarios were added
• A human-readable description of the changes was provided to include in CHANGELOG
• For significant changes, documentation in https://github.com/ClickHouse/clickhouse-docs was updated with further explanations or tutorials

[sonarqubecloud]

Quality Gate failed

Failed conditions
18.8% Coverage on New Code (required ≥ 80%)

See analysis details on SonarQube Cloud