EX-9875 test: limit dir restripe overstripe count

EX-9875 test: limit dir restripe overstripe count

Lack of LU-15527 code, the distributed transactions are slow. To
avoid test timeout, limit overstripe count and increase timeout for
sanity test_300ud and test_300ue.

Test-Parameters: trivial
Test-Parameters: mdtcount=4 testlist=sanity env=ONLY="300ud 300ue"
Test-Parameters: mdtcount=4 testlist=sanity env=ONLY="300ud 300ue"
Test-Parameters: mdtcount=4 testlist=sanity env=ONLY="300ud 300ue"
Test-Parameters: mdtcount=4 testlist=sanity env=ONLY="300ud 300ue"
Test-Parameters: mdtcount=4 testlist=sanity env=ONLY="300ud 300ue"
Signed-off-by: Lai Siyao <lai.siyao@whamcloud.com>
Change-Id: I830ac27e446f3841147be4777ba06cdb8e1a7f59
Reviewed-on: https://review.whamcloud.com/c/ex/lustre-release/+/55347
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>