LU-10813 kernel: kernel update RHEL6.9 [2.6.32-696.23.1.el6]

LU-10813 kernel: kernel update RHEL6.9 [2.6.32-696.23.1.el6]

Update RHEL6.9 kernel to 2.6.32-696.23.1.el6

Test-Parameters: clientdistro=el6.9 mdsdistro=el6.9 \
  ossdistro=el6.9 mdtfilesystemtype=ldiskfs \
  ostfilesystemtype=ldiskfs testgroup=review-ldiskfs

Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Change-Id: Iea0e1fb4cccd4c68ac50eac11970028dca01ee6a
Reviewed-on: https://review.whamcloud.com/31660
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Yang Sheng <yang.sheng@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>