Revert "XCOMMONS-2124: Upgrade to Checkstyle 8.40"
Revert "XCOMMONS-2124: Upgrade to Checkstyle 8.40"

This reverts commit 6fc194b7e6d67a2e7cbbada0cf96898be0125240.

xwiki/xwiki-commons,xwiki/xwiki-commons