LU-2148 kernel: Kernel update for latest FC18 kernel

Add fc18 support for build system

Signed-off-by: yang sheng <ys@whamcloud.com>
Change-Id: Iaeb24b5e44f969eb23a55d115b866c926b25bd55
Reviewed-on: http://review.whamcloud.com/5194
Reviewed-by: Bobi Jam <bobijam@gmail.com>
Tested-by: Hudson
Reviewed-by: Brian J. Murrell <brian.murrell@intel.com>
Reviewed-by: James Simmons <uja.ornl@gmail.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
LU-2840 tests: Clean the environment for test.

Use unique directory for sanityn test_21. Avoid it
impacted by previous test.

Signed-off-by: yang sheng <yang.sheng@intel.com>
Change-Id: I36a06605732bb0048c25c622d4c8f1192d761a88
Reviewed-on: http://review.whamcloud.com/5556
Tested-by: Hudson
Reviewed-by: Niu Yawei <yawei.niu@intel.com>
Reviewed-by: Jian Yu <jian.yu@intel.com>
Tested-by: Maloo <whamcloud.maloo@gmail.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>