LU-6556 obdclass: re-allow catalog to wrap around

LU-6556 obdclass: re-allow catalog to wrap around

Since patch for LU-4528 a LLOG catalog is no longer allowed to
wrap around. This is a regression and it can also cause catalog
corruption (grow behind max-size/records) upon upgrading if
catalog has already wrap around.

This patch reintroduces catalog wrap around capability, and also
introduces a new test to extensively check it.

Signed-off-by: Bruno Faccini <bruno.faccini@intel.com>
Change-Id: Ife9a452199895ed9d9f43eb9fdeeac15322e272a
Reviewed-on: http://review.whamcloud.com/14912
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>