LU-12540 tests: squash multiply -O -E options

LU-12540 tests: squash multiply -O -E options

mkfs.lustre and e2fsprogs don't support a multiply
-O -E options. after checking a code, i think easy
way is handle it situation in the test-framework.

Fixes: 591a9b4cebc5 ("LU-9846 lod: Add overstriping support")
Test-Parameter: trivial

Cray-bug-id: LUS-7479
Signed-off-by: Alexey Lyashkov <c17817@cray.com>
Change-Id: I54cab1e02093136a3550a76d1262aeb281118bae
Reviewed-on: https://review.whamcloud.com/35482
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>