chore: replace APPLICATION_JSON with TEXT_PLAIN in dynamic create graph api

[simon824]

The format of the graph instance config is text instead of json

[codecov]

Codecov Report

Merging #1888 (4d1d6f9) into master (335f0ea) will increase coverage by 4.28%.
The diff coverage is n/a.

@@             Coverage Diff              @@
##             master    #1888      +/-   ##
============================================
+ Coverage     66.75%   71.04%   +4.28%     
- Complexity      728      980     +252     
============================================
  Files           451      451              
  Lines         38207    38207              
  Branches       5407     5407              
============================================
+ Hits          25506    27144    +1638     
+ Misses        10184     8413    -1771     
- Partials       2517     2650     +133     

Impacted Files	Coverage Δ
...api/src/main/java/com/baidu/hugegraph/api/API.java	74.11% <ø> (ø)
...ava/com/baidu/hugegraph/api/profile/GraphsAPI.java	0.00% <ø> (ø)
...m/baidu/hugegraph/backend/tx/GraphTransaction.java	80.14% <0.00%> (+0.20%)	⬆️
...c/main/java/com/baidu/hugegraph/task/HugeTask.java	72.22% <0.00%> (+0.30%)	⬆️
.../baidu/hugegraph/backend/tx/SchemaTransaction.java	89.31% <0.00%> (+0.38%)	⬆️
...gegraph/backend/cache/CachedSchemaTransaction.java	91.30% <0.00%> (+0.48%)	⬆️
...om/baidu/hugegraph/task/StandardTaskScheduler.java	76.15% <0.00%> (+0.48%)	⬆️
.../main/java/com/baidu/hugegraph/util/Consumers.java	56.84% <0.00%> (+0.68%)	⬆️
...a/com/baidu/hugegraph/backend/query/Condition.java	79.44% <0.00%> (+0.69%)	⬆️
...a/com/baidu/hugegraph/auth/HugeGraphAuthProxy.java	58.38% <0.00%> (+0.73%)	⬆️
... and 45 more

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[imbajin]

@wangyao2016 could u take a look for it & check if we need update for other api?

[wangyao2016]

@wangyao2016 could u take a look for it?

Sure. IMO both Json and text are fine , PropertiesConfiguration supports parsing two formats. But text is better.

Or we can support both, just remove the limit of @Consumes(APPLICATION_JSON_WITH_CHARSET).

[imbajin]

@wangyao2016 could u take a look for it?

Sure. IMO both Json and text are fine , PropertiesConfiguration supports parsing two formats. But text is better.

Or we can support both, just remove the limit of @Consumes(APPLICATION_JSON_WITH_CHARSET).

could enhance it together next time