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 b_es6_0 clients and b_es5_2
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: TBD (from 12282314e2567973b1a7cb4d6806e987bf1a6755)

Test-Parameters: trivial testlist=sanity-quota.sh serverversion=2.12.6-ddn66
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/47307
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>