LU-7227 tests: check dmesg for errors after test

LU-7227 tests: check dmesg for errors after test

Add a check to t-f that dmesg doesn't have critical messages
after test execution. The list of error  messages in
"check_dmesg_for_erros" should be updated by developers.

Change-Id: If33ab73865121a56b9a21afd10fa1635f30dcbbe
Xyratex-bug-id: MRP-2713
Signed-off-by: Sergey Cheremencev <sergey.cheremencev@seagate.com>
Reviewed-by: Elena V. Gryaznova <elena.gryaznova@seagate.com>
Tested-by: Elena V. Gryaznova <elena.gryaznova@seagate.com>
Reviewed-by: Alexander Zarochentsev <alexander.zarochentsev@seagate.com>
Reviewed-on: http://review.whamcloud.com/16665
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: James Nunez <james.a.nunez@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>