Revert "XWIKI-16849: Upgrade to FOP 2.4"
Revert "XWIKI-16849: Upgrade to FOP 2.4"

This reverts commit 74857485d05f050cbd838babab5158b8c6490bdf.

xwiki/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform,xwiki/xwiki-platform