LU-13813 tests: fix stack_trap in conf-sanity test 110/111

LU-13813 tests: fix stack_trap in conf-sanity test 110/111

This patch fixes stack_trap in conf-sanity test 110 and 111
to restore test environment.

Lustre-change: https://review.whamcloud.com/48022
Lustre-commit: 0109cee2610b8dfeaaca25c3eb1e805e033c593d

Test-Parameters: trivial env=SLOW=yes,ENABLE_QUOTA=yes clientdistro=el8.5 serverdistro=el8.5 testlist=conf-sanity
Test-Parameters: env=SLOW=yes,ENABLE_QUOTA=yes fstype=zfs clientdistro=el8.5 serverdistro=el8.5 testlist=conf-sanity
Test-Parameters: env=SLOW=yes,ENABLE_QUOTA=yes mdscount=2 mdtcount=4 clientdistro=el8.5 serverdistro=el8.5 testlist=conf-sanity
Signed-off-by: Jian Yu <yujian@whamcloud.com>
Change-Id: I540d96e8ad2c4990e7da18fe22256b44e9a19c72
Reviewed-on: https://review.whamcloud.com/48023
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>