[pom] Fix maven clean plugin since maven didn't do it!

maven caused a defect with 3.4.1.  instead of fixing it they put blame on the world, so we are all fixing it 👎

Author: hazendaz

eclipse/pom.xml

@@ -97,6 +97,9 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-clean-plugin</artifactId>
           <version>3.5.0</version>
+          <configuration>
+            <force>true</force>
+          </configuration>
         </plugin>
         <plugin>
           <groupId>org.eclipse.tycho</groupId>