LU-7001 osp: fix llog processing

LU-7001 osp: fix llog processing

The osp_sync_thread base on fact that llog_cat_process
will not end until umount. This is worng when processing reaches
bottom of catalog, or if catalog is wrapped.
The patch fixes this issue.

For wrapped catalog llog_process_thread could process old
record.
1 thread llog_process_thread read chunk and proccing first record
2 thread add rec to this catalog at this chunk and
  update bitmap
1 check bitmap for next idx and process old record

Test conf-sanity 106 was added.

Signed-off-by: Alexander Boyko <alexander.boyko@seagate.com>
Seagate-bug-id: MRP-4235
Change-Id: Ifc983018e3a325622ef3215bec4b69f5c9ac2ba2
Reviewed-on: https://review.whamcloud.com/26132
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andriy Skulysh
Reviewed-by: Mike Pershin <mike.pershin@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>