XCOMMONS-106: Upgrade Maven Site plugin to version 3.0 XCOMMONS-97: Upgrade Maven SSH Wagon to version 2.2
XCOMMONS-106: Upgrade Maven Site plugin to version 3.0
XCOMMONS-97: Upgrade Maven SSH Wagon to version 2.2

+ Fix broken "mvn site" execution

xwiki/xwiki-commons,xwiki/xwiki-commons