Revert "[release] Removed revapi ignores from the previous version"

The ignores are for XWiki 17.0.0RC1.

This reverts commit 12e41c8.

Author: michitux

xwiki-commons-core/pom.xml

@@ -223,7 +223,21 @@
               </differences>
             </revapi.differences>
             -->
-            
+            <revapi.differences>
+              <differences>
+                <item>
+                  <code>java.class.removed</code>
+                  <old>class org.xwiki.xml.html.HTMLUtils.XWikiXMLOutputter</old>
+                  <justification>
+                    For security reasons, we need to get rid of JDOM 1 and this class extended a class that can’t be
+                    extended in JDOM 2. As it makes little sense to expose this class, instead of breaking it, it has
+                    been made private. As far we're aware, it hasn't been used outside HTMLUtils and thus shouldn't
+                    break anything.
+                  </justification>
+                  <criticality>highlight</criticality>
+                </item>
+              </differences>
+            </revapi.differences>
           </analysisConfiguration>
         </configuration>
       </plugin>