LU-10456 kernel: kernel update RHEL6.9 [2.6.32-696.18.7.el6]

LU-10456 kernel: kernel update RHEL6.9 [2.6.32-696.18.7.el6]

Update RHEL6.9 kernel to 2.6.32-696.18.7.el6

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

Change-Id: Ib0b7d5ff7f50f96c8bbc064541ae5c8bf2a4367f
Signed-off-by: Bob Glossman <bob.glossman@intel.com>
Reviewed-on: https://review.whamcloud.com/30737
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Tested-by: Jenkins
Reviewed-by: Minh Diep <minh.diep@intel.com>
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: John L. Hammond <john.hammond@intel.com>