LU-14300 quota: avoid nested lqe lookup

LU-14300 quota: avoid nested lqe lookup

lqe_locate called from qmt_pool_lqes_lookup for lqe
that hasn't an entry on a disk calls qmt_lqe_set_default.
This may call qmt_set_id_notify->qmt_pool_lqes_spec
and rewrite already added lqes in a qti. Rewritten
lqes may trigger an assertion:

LustreError: 5072:0:(qmt_pool.c:838:qmt_pool_lqes_lookup())
ASSERTION( (((qmt_info(env)->qti_lqes_num) > 16 ?
qmt_info(env)->qti_lqes : qmt_info(env)->qti_lqes_small)[(
qmt_info(env)->qti_glbl_lqe_idx)])->lqe_is_global ) failed:
LustreError: 5072:0:(qmt_pool.c:838:qmt_pool_lqes_lookup()) LBUG
Pid: 5072, comm: mdt_rdpg00_003 3.10.0-957.1.3957.1.3.x4.1.15.x86_64
Call Trace:
 [<ffffffffc046f62c>] libcfs_call_trace+0x8c/0xc0 [libcfs]
 [<ffffffffc046f94c>] lbug_with_loc+0x4c/0xa0 [libcfs]
 [<ffffffffc0e4ae38>] qmt_pool_lqes_lookup+0x798/0x8f0 [lquota]
 [<ffffffffc0e3b0ce>] qmt_intent_policy+0x86e/0xe00 [lquota]
 [<ffffffffc109d53d>] mdt_intent_opc+0x3bd/0xb40 [mdt]
 [<ffffffffc10a5134>] mdt_intent_policy+0x1a4/0x360 [mdt]
 [<ffffffffc0a7bedb>] ldlm_lock_enqueue+0x3cb/0xad0 [ptlrpc]
 [<ffffffffc0aa4a46>] ldlm_handle_enqueue0+0xa56/0x1610 [ptlrpc]
 [<ffffffffc0b304b2>] tgt_enqueue+0x62/0x210 [ptlrpc]
 [<ffffffffc0b3753a>] tgt_request_handle+0x7ea/0x1750 [ptlrpc]

or a deadlock(2 same lqes qti_lqes array):

 call_rwsem_down_write_failed+0x17/0x30
 qti_lqes_write_lock+0xb1/0x1b0 [lquota]
 qmt_dqacq0+0x2ee/0x1ac0 [lquota]
 qmt_intent_policy+0xbfe/0xe00 [lquota]
 mdt_intent_opc+0x3ba/0xb50 [mdt]
 mdt_intent_policy+0x1a1/0x360 [mdt]
 ldlm_lock_enqueue+0x3d6/0xaa0 [ptlrpc]
 ldlm_handle_enqueue0+0xa76/0x1620 [ptlrpc]
 tgt_enqueue+0x62/0x210 [ptlrpc]
 tgt_request_handle+0x96a/0x1680 [ptlrpc]
 kthread+0xd1/0xe0

Patch adds a sanity-quota_73b to check that the isssue
doesn't exist anymore.

Lustre-change: https://review.whamcloud.com/43326
Lustre-commit: 188112fc806c8c61d536ba3230b8d50f65e4f8fc

Change-Id: Ib1ebe82c3b6e819b2538f30af08930060bd659ae
HPE-bug-id: LUS-9902
Signed-off-by: Sergey Cheremencev <sergey.cheremencev@hpe.com>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Alexander Zarochentsev <c17826@cray.com>
Reviewed-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-by: Wang Shilong <wshilong@whamcloud.com>
Reviewed-on: https://review.whamcloud.com/45183
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Hongchao Zhang <hongchao@whamcloud.com>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>