Remove H2 Test Project from Repository due to 3rd-party vulnerability issue CVE-2022-23221

Current Situation

• JobScheduler Master, Agent and JOC do not ship with a J2 JDBC Driver and are not affected by this vulnerability.
• see https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-23221
• Due to a remaining detached test project only, the repository's vulnerability guard warns about existing dependencies.

Desired Behavior

• As JobScheduler Master, Agent and JOC do not ship with a H2 JDBC Driver any current references in the repository should be removed.