LU-5771 ldiskfs: cleanup orphan inode in error path

LU-5771 ldiskfs: cleanup orphan inode in error path

Commit from upstream: 4538821993f4486c76090dfb377c60c0a0e71ba3

There were some error paths in ext4_delete_inode() which was not
dropping the inode from the orphan list.  This could lead to a BUG_ON
on umount when the orphan list is discovered to be non-empty.

Signed-off-by: Wang Shilong <wshilong@ddn.com>
Change-Id: Ica2c87ae378cc23eed70c1bfeb96db3852d218dc
Reviewed-on: http://review.whamcloud.com/12349
Tested-by: Jenkins
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Tested-by: Maloo <hpdd-maloo@intel.com>