feat: updates service accept header to application/json

[karel-rehor]

Closes #719
Closes #744

Proposed Changes

• changes Accept header in InfluxQLQueryService to application/json
• adds deserializers for json results
• adds tests

Checklist

• CHANGELOG.md updated
• Rebased/mergeable
• A test has been added if appropriate
• mvn test completes successfully
• Commit messages are conventional
• Sign CLA (if not already signed)

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 87.85047% with 13 lines in your changes missing coverage. Please review.

Project coverage is 88.51%. Comparing base (546197d) to head (92295f9).
Report is 10 commits behind head on master.

Files	Patch %	Lines
...influxdb/client/internal/InfluxQLQueryApiImpl.java	91.56%	4 Missing and 3 partials ⚠️
...n/java/com/influxdb/internal/AbstractQueryApi.java	28.57%	4 Missing and 1 partial ⚠️
...java/com/influxdb/client/domain/InfluxQLQuery.java	94.11%	0 Missing and 1 partial ⚠️

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Additional details and impacted files

@@             Coverage Diff              @@
##             master     #733      +/-   ##
============================================
+ Coverage     88.37%   88.51%   +0.14%     
+ Complexity      786      784       -2     
============================================
  Files           174      174              
  Lines          7091     7195     +104     
  Branches        391      405      +14     
============================================
+ Hits           6267     6369     +102     
+ Misses          698      696       -2     
- Partials        126      130       +4     

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[bednar]

Please address also issue from #744.

[bednar]

Thank you for your PR! 👍 Before we can proceed with accepting it, there are a few requirements that need to be met:

[bednar]

Thanks again for your PR 👍

LGTM 🚀