[POC-FIX-PMD] maven-pmd-plugin: reactivate PMD - minimumPriority 2

[Pankraz76]

enabler:

• [POC-FIX-PMD] maven-pmd-plugin: reactivate PMD - Best practices #2331

PMD Failure:

• [WARNING] PMD Failure: org.apache.maven.api.JavaPathType:262 Rule:UnnecessaryModifier Priority:3 Unnecessary modifier 'final' on method 'format': the method is already in a final class.
• [WARNING] PMD Failure: org.apache.maven.internal.xml.DefaultXmlService:396 Rule:UnusedPrivateMethod Priority:3 Avoid unused private methods such as 'findNodeById(List, String)'..
• [WARNING] PMD Failure: org.apache.maven.internal.xml.DefaultXmlService:404 Rule:UnusedPrivateMethod Priority:3 Avoid unused private methods such as 'findNodeByKeys(List, XmlNode, String[])'..
• [WARNING] PMD Failure: org.apache.maven.di.impl.Types:360 Rule:JumbledIncrementer Priority:3 Avoid modifying an outer loop incrementer in an inner loop for update expression.