Update: JUnit 5, Mockito, PowerMock

We updated the following test libraries:

(CMS-20026)

Prevented creation of empty JAR files

The maven-jar-plugin is now configured with skipIfEmpty=true in all parent POMs. This prevents build failures or the need to add dummy resources for modules that don't contain any runtime sources or resources - e.g. those that only contain tests. Please note that installation and deployment must be skipped individually in its pom.xml when such a module is added:

<properties>
    <maven.deploy.skip>true</maven.deploy.skip>
    <maven.install.skip>true</maven.install.skip>
  </properties>

(CMS-19388)