(doc) Update plugin' configuration parameter (MJAVADOC-475)

Author: pzygielo

src/it/projects/examples/alternate-doclet/pom.xml

@@ -47,7 +47,9 @@
             <artifactId>umlgraph</artifactId>
             <version>5.6.6</version>
           </docletArtifact>
-          <additionalOptions>-views</additionalOptions>
+          <additionalOptions>
+            <option>-views</option>
+          </additionalOptions>
         </configuration>
       </plugin>
       <!-- END SNIPPET: umlgraph -->