use new auth settings

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
remove old journal size setting

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
update tests for the new config changes

Signed-off-by: Alfredo Deza <alfredo.deza@inktank.com>
Merge pull request #143 from alfredodeza/6788

use new auth settings

Reviewed-by: Sage Weil <sage@inktank.com>