fix AuthGroups::getGroupRegCodes() so it works with legacy code when no params passed in; add getRolesToDisplay().
fix AuthGroups::getGroupRegCodes() so it works with legacy code when no params passed in; add getRolesToDisplay().

baracudda/phpBitsTheater,baracudda/phpBitsTheater,baracudda/phpBitsTheater,baracudda/phpBitsTheater