post tx xmode check from db not batch cache

[godeamon]

两笔交易引用同一个key时，并发提交，XMdel检查读集合时从状态机查询数据，而不是batch cache，因为batch cache是给执行区块时用的。

[codecov-commenter]

Codecov Report

Merging #340 (0bdf611) into master (cffcfcd) will decrease coverage by 0.02%. The diff coverage is 50.00%.

@@            Coverage Diff             @@
##           master     #340      +/-   ##
==========================================
- Coverage   45.63%   45.60%   -0.03%     
==========================================
  Files         139      139              
  Lines       12362    12371       +9     
==========================================
+ Hits         5641     5642       +1     
- Misses       5567     5575       +8     
  Partials     1154     1154              

Impacted Files	Coverage Δ
bcs/ledger/xledger/state/xmodel/xmodel_verify.go	46.66% <50.00%> (+3.80%)	:arrow_up:
bcs/consensus/xpoa/xpoa.go	51.26% <0.00%> (-2.04%)	:arrow_down:
bcs/ledger/xledger/state/xmodel/xmodel.go	62.85% <0.00%> (-1.43%)	:arrow_down:
bcs/network/p2pv2/server.go	51.33% <0.00%> (-1.07%)	:arrow_down:
kernel/consensus/base/driver/chained-bft/smr.go	41.33% <0.00%> (+0.74%)	:arrow_up:
bcs/consensus/tdpos/tdpos.go	48.82% <0.00%> (+0.93%)	:arrow_up:

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