LU-4287 kernel: kernel update RHEL6.5 [2.6.32-431.3.1.el6]

LU-4287 kernel: kernel update RHEL6.5 [2.6.32-431.3.1.el6]

Add RHEL6.5 support [2.6.32-431.3.1.el6]

ext4 in RHEL6.5's kernel version 2.6.32-431.3.1.el6 no longer contains
the required function ext4_ext_walk_space(). We start a new rhel6.5
ldiskfs patch series and reintroduce ext4_ext_walk_space() through an
new patch, copying ext4_ext_walk_space() from older kernel rhel6.4
2.6.32-358.23.2.el6.

Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Signed-off-by: yang sheng <yang.sheng@intel.com>
Change-Id: I7112747970343b1264910aa21d7a62c45b5ca1ea
Reviewed-on: http://review.whamcloud.com/8549
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Johann Lombardi <johann.lombardi@intel.com>
Reviewed-by: Alex Zhuravlev <alexey.zhuravlev@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>