Adding Pinot Minion client

[xiangfu0]

Description

Adding Pinot Minion client to operate on controller /tasks APIs.

[codecov-io]

Codecov Report

Merging #6339 (dabca09) into master (1beaab5) will decrease coverage by 20.90%.
The diff coverage is 51.88%.

@@             Coverage Diff             @@
##           master    #6339       +/-   ##
===========================================
- Coverage   66.44%   45.53%   -20.91%     
===========================================
  Files        1075     1285      +210     
  Lines       54773    62034     +7261     
  Branches     8168     9001      +833     
===========================================
- Hits        36396    28250     -8146     
- Misses      15700    31475    +15775     
+ Partials     2677     2309      -368     

Flag	Coverage Δ
integration	45.53% <51.88%> (?)

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...ot/broker/broker/AllowAllAccessControlFactory.java	100.00% <ø> (ø)
.../helix/BrokerUserDefinedMessageHandlerFactory.java	52.83% <0.00%> (-13.84%)	⬇️
...org/apache/pinot/broker/queryquota/HitCounter.java	0.00% <0.00%> (-100.00%)	⬇️
...che/pinot/broker/queryquota/MaxHitRateTracker.java	0.00% <0.00%> (ø)
...ache/pinot/broker/queryquota/QueryQuotaEntity.java	0.00% <0.00%> (-50.00%)	⬇️
...ker/routing/instanceselector/InstanceSelector.java	100.00% <ø> (ø)
...ceselector/StrictReplicaGroupInstanceSelector.java	0.00% <0.00%> (ø)
.../main/java/org/apache/pinot/client/Connection.java	22.22% <0.00%> (-26.62%)	⬇️
...not/common/assignment/InstancePartitionsUtils.java	64.28% <ø> (-8.89%)	⬇️
.../apache/pinot/common/exception/QueryException.java	90.27% <ø> (+5.55%)	⬆️
... and 1281 more

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[Jackie-Jiang]

LGTM otherwise.
Minion is not ready to be used out of the box, and the APIs are subject to be changed. Not sure if we should add the client now, or hold until minion is ready

[Jackie-Jiang]

This test is not actually testing the functionality as the response is hard-coded within the test. You may modify the minion integration test to test against the controller.

[xiangfu0]

will do

[xiangfu0]

LGTM otherwise.
Minion is not ready to be used out of the box, and the APIs are subject to be changed. Not sure if we should add the client now, or hold until minion is ready

this is a good question, I will comment and make it a test feature I guess. I feel it would be good to have it and it's ok to change it and deprecate the methods in the future.