LU-13952 quota: default OST Pool Quotas

LU-13952 quota: default OST Pool Quotas

Patch makes ability to set default quota
limits per OST pool.
Patch also adds sanity-quota_73.

Lustre-change: https://review.whamcloud.com/39873
Lustre-commit: 25a70a88c9eb35b7e43347c0d8220e334591d25e

Test-Parameters: testlist=sanity-quota
HPE-bug-id: LUS-9133
Change-Id: I9e49def231aeeed4588e5e3fbcd29fdd62a35855
Signed-off-by: Sergey Cheremencev <sergey.cheremencev@hpe.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-on: https://review.whamcloud.com/45182
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Hongchao Zhang <hongchao@whamcloud.com>