LU-836 ldiskfs: require ldiskfs filesystem has journal

LU-836 ldiskfs: require ldiskfs filesystem has journal

Add check for journal presence during ldiskfs mount

Xyratex-Bug-Id: MRP-118
Change-Id: If26005f7b597ed8815991fac7cda80e1df2f36e9
Signed-off-by: Andriy Skulysh <Andriy_Skulysh@xyratex.com>
Reviewed-by: Alexey Lyashkov <alexey_lyashkov@xyratex.com>
Reviewed-by: Andrew Perepechko <andrew_perepechko@xyratex.com>
Reviewed-on: http://review.whamcloud.com/1687
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: Hudson
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>