fix: spark row split by delimiter failed

[simon824]

closed #327

[codecov]

Codecov Report

Merging #328 (6235c97) into master (c091e6b) will decrease coverage by 5.23%.
The diff coverage is 0.00%.

@@             Coverage Diff              @@
##             master     #328      +/-   ##
============================================
- Coverage     72.72%   67.49%   -5.24%     
+ Complexity     1849      877     -972     
============================================
  Files           242       86     -156     
  Lines          8104     4024    -4080     
  Branches        717      475     -242     
============================================
- Hits           5894     2716    -3178     
+ Misses         1827     1104     -723     
+ Partials        383      204     -179     

Impacted Files	Coverage Δ
...u/hugegraph/loader/spark/HugeGraphSparkLoader.java	0.00% <0.00%> (ø)
.../baidu/hugegraph/structure/constant/Direction.java
...m/baidu/hugegraph/structure/auth/TokenPayload.java
.../baidu/hugegraph/structure/schema/SchemaLabel.java
.../baidu/hugegraph/structure/constant/Frequency.java
...om/baidu/hugegraph/structure/gremlin/Response.java
.../baidu/hugegraph/structure/schema/VertexLabel.java
...java/com/baidu/hugegraph/driver/CypherManager.java
.../baidu/hugegraph/api/traverser/CrosspointsAPI.java
...ava/com/baidu/hugegraph/api/traverser/RaysAPI.java
... and 147 more

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