Some dependencies are not properly scoped and may cause memory leaks

The following dependencies are not properly scoped in pom.xml:

• junit:junit
• org.mockito:mockito-all
• org.jenkins-ci.main:jenkins-test-harness

Currently, as they are not in the test scope as they should, they will be included in the plugin and may cause issues. In particular, having org.jenkins-ci.main:jenkins-test-harness can cause memory leaks.

The test scope must be added to those dependencies.