LU-15846 tests: don't use comma-separated debug flags

LU-15846 tests: don't use comma-separated debug flags

To avoid test interop issues between 2.15 clients and 2.12/2.14
servers, don't use comma-separated debug flags in sanity-quota.sh
quota_init() and quota_fini().

Lustre-change: https://review.whamcloud.com/47308
Lustre-commit: fe8315c25ed093d77a6f366e2a4849aba008b680

Test-Parameters: trivial testlist=sanity-quota env=ONLY=48 serverversion=2.14.0
Fixes: 6b6fde1026 ("LU-13055 libcfs: allow comma-separated masks")
Fixes: 78be823f33 ("LU-15218 quota: delete unused quota ID")
Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: Ifca39054d14292bca8bcff9b8e03ae58fd5cc3a8
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/57100
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Sarah Liu <sarah@whamcloud.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>