fix uuid serialize

[javeme]

implement: #618
Change-Id: I4615dacacdc818302563e11bd58c616a3b1cef03

[codecov]

Codecov Report

Merging #694 into master will decrease coverage by 0.67%.
The diff coverage is 76.36%.

@@             Coverage Diff              @@
##             master     #694      +/-   ##
============================================
- Coverage     74.31%   73.64%   -0.68%     
+ Complexity     4090     4075      -15     
============================================
  Files           220      220              
  Lines         17918    17928      +10     
  Branches       2571     2573       +2     
============================================
- Hits          13316    13203     -113     
- Misses         3247     3373     +126     
+ Partials       1355     1352       -3

Impacted Files	Coverage Δ	Complexity Δ
...u/hugegraph/schema/builder/VertexLabelBuilder.java	87.06% <ø> (ø)	65 <0> (ø)	⬇️
...n/java/com/baidu/hugegraph/schema/VertexLabel.java	100% <ø> (ø)	8 <0> (ø)	⬇️
...java/com/baidu/hugegraph/type/define/DataType.java	85.33% <100%> (ø)	38 <0> (ø)	⬇️
...va/com/baidu/hugegraph/backend/id/IdGenerator.java	82.2% <50%> (-1.67%)	19 <0> (ø)
...idu/hugegraph/backend/id/SnowflakeIdGenerator.java	65.51% <50%> (ø)	7 <0> (ø)	⬇️
...c/main/java/com/baidu/hugegraph/util/JsonUtil.java	60.41% <62.5%> (-3.74%)	6 <0> (ø)
...ava/com/baidu/hugegraph/io/HugeGraphSONModule.java	70.18% <78.12%> (+8.18%)	6 <5> (+3)	⬆️
.../java/com/baidu/hugegraph/util/StringEncoding.java	81.66% <90%> (+1.66%)	20 <4> (+4)	⬆️
...graph/backend/store/scylladb/ScyllaDBFeatures.java	0% <0%> (-100%)	0% <0%> (-3%)
...h/backend/store/scylladb/ScyllaDBTablesWithMV.java	0% <0%> (-84.16%)	0% <0%> (-10%)
... and 6 more

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[zhoney]

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