catch any exception for mysql close when reset()

[lxb1111]

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[codecov]

Codecov Report

Merging #1661 (2a0d97d) into master (6d7f5cc) will increase coverage by 2.19%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master    #1661      +/-   ##
============================================
+ Coverage     64.76%   66.95%   +2.19%     
- Complexity     6913     7067     +154     
============================================
  Files           421      421              
  Lines         34670    34673       +3     
  Branches       4801     4802       +1     
============================================
+ Hits          22455    23217     +762     
+ Misses         9923     9110     -813     
- Partials       2292     2346      +54     

Impacted Files	Coverage Δ
...u/hugegraph/backend/store/mysql/MysqlSessions.java	68.42% <0.00%> (+10.52%)	⬆️
...du/hugegraph/backend/tx/GraphIndexTransaction.java	84.05% <0.00%> (+0.05%)	⬆️
...c/main/java/com/baidu/hugegraph/task/HugeTask.java	72.30% <0.00%> (+0.30%)	⬆️
...egraph/backend/store/cassandra/CassandraStore.java	72.64% <0.00%> (+0.85%)	⬆️
...du/hugegraph/backend/store/BackendSessionPool.java	80.55% <0.00%> (+2.77%)	⬆️
...baidu/hugegraph/backend/store/mysql/MysqlUtil.java	96.61% <0.00%> (+3.38%)	⬆️
.../baidu/hugegraph/backend/store/BackendSession.java	80.95% <0.00%> (+4.76%)	⬆️
...aidu/hugegraph/backend/store/mysql/MysqlTable.java	81.59% <0.00%> (+5.76%)	⬆️
...idu/hugegraph/backend/store/mysql/MysqlTables.java	89.67% <0.00%> (+13.16%)	⬆️
... and 9 more

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