Upgrade Maven

Update version.maven in book.json
Update version.maven in pom.xml
Update distribution URL in .mvn/wrapper/maven-wrapper.properties
Update the result of mvn --version in primer/install.md

Upgrade JUnit

Update version.junit in book.json
Update version.junit in pom.xml

Upgrade JDK

Update version.jdk in book.json
Update <requireJavaVersion> in pom.xml
Update result of mvn -v in primer/install.md