add some rocksdb options

[javeme]

Change-Id: I77a143d113bc89df57274e7c7815bc4a798bcbea

[codecov]

Codecov Report

Merging #825 into master will increase coverage by 0.62%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #825      +/-   ##
============================================
+ Coverage     71.16%   71.78%   +0.62%     
- Complexity     4358     4381      +23     
============================================
  Files           283      283              
  Lines         20967    20992      +25     
  Branches       2959     2959              
============================================
+ Hits          14921    15070     +149     
+ Misses         4566     4442     -124     
  Partials       1480     1480

Impacted Files	Coverage Δ	Complexity Δ
...raph/backend/store/rocksdb/RocksDBStdSessions.java	69.97% <100%> (+0.72%)	29 <0> (ø)	⬇️
...ugegraph/backend/store/rocksdb/RocksDBOptions.java	99.24% <100%> (+0.09%)	2 <0> (ø)	⬇️
...du/hugegraph/backend/tx/GraphIndexTransaction.java	81.05% <0%> (+0.39%)	180% <0%> (ø)	⬇️
...baidu/hugegraph/backend/store/mysql/MysqlUtil.java	96.61% <0%> (+3.38%)	23% <0%> (ø)	⬇️
...aidu/hugegraph/backend/store/mysql/MysqlTable.java	81.85% <0%> (+8.54%)	72% <0%> (+10%)	⬆️
...u/hugegraph/backend/store/mysql/MysqlSessions.java	61.99% <0%> (+9.5%)	20% <0%> (+8%)	⬆️
...idu/hugegraph/backend/store/mysql/MysqlTables.java	89.05% <0%> (+13.96%)	1% <0%> (ø)	⬇️
...aidu/hugegraph/backend/store/mysql/MysqlStore.java	76.34% <0%> (+17.74%)	38% <0%> (+1%)	⬆️
...egraph/backend/store/mysql/MysqlStoreProvider.java	100% <0%> (+66.66%)	6% <0%> (+4%)	⬆️

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