PDFBOX-370: Website build does not work with Java 6
PDFBOX-370: Website build does not work with Java 6

Work around the issue by disabling sitemap validation

git-svn-id: 73746072a361c8027bb2177f17128911b05b2bab@686646 13f79535-47bb-0310-9956-ffa450edef68

apache/pdfbox,kalaspuffar/pdfbox,kalaspuffar/pdfbox,apache/pdfbox