LU-13366 tests: add SEL support to racer

LU-13366 tests: add SEL support to racer

some files are created with a sel layout if RACER_ENABLE_SEL is set

Test-Parameters: testlist=racer envdefinitions="RACER_ENABLE_SEL=true"
Signed-off-by: Vitaly Fertman <c17818@cray.com>
Change-Id: I1f699988fdd0a0dbb19b71d6ea353d68326d0d5b
Reviewed-by: Alexander Zarochentsev <c17826@cray.com>
Reviewed-by: Elena Gryaznova <c17455@cray.com>
Tested-by: Elena Gryaznova <c17455@cray.com>
Reviewed-on: https://es-gerrit.dev.cray.com/156106
HPE-bug-id: LUS-7591
Reviewed-on: https://review.whamcloud.com/37959
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>