fix rocksdb config data_disks allowed keys

[zhoney]

also fix bug of byte[] add()

Change-Id: I2bf8e354d4c3e5cf58997cf5ac4d4e90494c59f6

[codecov]

Codecov Report

Merging #1585 (15f08f6) into master (0dc7b27) will decrease coverage by 0.42%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #1585      +/-   ##
============================================
- Coverage     63.26%   62.83%   -0.43%     
+ Complexity     6703     6680      -23     
============================================
  Files           418      418              
  Lines         34449    34449              
  Branches       4765     4765              
============================================
- Hits          21793    21646     -147     
- Misses        10407    10564     +157     
+ Partials       2249     2239      -10     

Impacted Files	Coverage Δ
...ugegraph/backend/store/rocksdb/RocksDBOptions.java	99.25% <ø> (ø)
...om/baidu/hugegraph/backend/store/BackendTable.java	84.66% <100.00%> (ø)
...graph/backend/store/scylladb/ScyllaDBFeatures.java	0.00% <0.00%> (-100.00%)	⬇️
...h/backend/store/scylladb/ScyllaDBTablesWithMV.java	0.00% <0.00%> (-96.04%)	⬇️
.../backend/store/scylladb/ScyllaDBStoreProvider.java	0.00% <0.00%> (-94.60%)	⬇️
...va/com/baidu/hugegraph/auth/HugeAuthenticator.java	34.78% <0.00%> (-5.44%)	⬇️
...egraph/backend/store/cassandra/CassandraShard.java	50.92% <0.00%> (-1.86%)	⬇️
...in/java/com/baidu/hugegraph/auth/HugeResource.java	77.92% <0.00%> (-1.30%)	⬇️
.../java/com/baidu/hugegraph/auth/RolePermission.java	90.58% <0.00%> (-1.18%)	⬇️
.../backend/store/cassandra/CassandraSessionPool.java	56.12% <0.00%> (-1.03%)	⬇️
... and 2 more

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