[MPMD-247] Upgrade to PMD 6.0.0

* Provide a new default ruleset: maven-pmd-plugin-default.xml
* Update documentation
10 files changed
tree: 4e59b16b0b20bfd9beee2827b6fef7c43aa4465f
  1. src/
  2. .gitignore
  3. Jenkinsfile
  4. pom.xml