In Table A.10. Database Module Options there is option rolesQuery with "select Role, RoleGroup from Roles where PrincipalID=?" default value, but it has not default value, so it should be "none".
Moving to ON_QA. The changes should be available for review on the documentation stage within an hour or so from this comment. http://documentation-devel.engineering.redhat.com/site/documentation/en-US/JBoss_Enterprise_Application_Platform/
Verified on stage.