KYLIN-4334 Auto discard all jobs while disable the Real Time Cube

[wangxiaojing123]

• issue link : https://issues.apache.org/jira/browse/KYLIN-4334

[codecov-io]

Codecov Report

Merging #1051 into master will decrease coverage by 0.01%.
The diff coverage is 0%.

@@             Coverage Diff              @@
##             master    #1051      +/-   ##
============================================
- Coverage        25%   24.99%   -0.02%     
+ Complexity     6180     6179       -1     
============================================
  Files          1438     1438              
  Lines         87669    87680      +11     
  Branches      12256    12258       +2     
============================================
- Hits          21926    21915      -11     
- Misses        63593    63612      +19     
- Partials       2150     2153       +3

Impacted Files	Coverage Δ	Complexity Δ
...ava/org/apache/kylin/rest/service/CubeService.java	0% <0%> (ø)	0 <0> (ø)	⬇️
...ream/core/storage/columnar/ColumnarStoreCache.java	52.27% <0%> (-3.41%)	8% <0%> (ø)
...che/kylin/stream/core/storage/CheckPointStore.java	63.63% <0%> (-3.04%)	21% <0%> (-1%)
...he/kylin/job/impl/threadpool/DefaultScheduler.java	74.41% <0%> (-2.33%)	12% <0%> (ø)
...rg/apache/kylin/cube/inmemcubing/MemDiskStore.java	69.3% <0%> (-0.92%)	7% <0%> (ø)

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[coveralls]

Pull Request Test Coverage Report for Build 5500

• 0 of 11 (0.0%) changed or added relevant lines in 1 file are covered.
• 8 unchanged lines in 3 files lost coverage.
• Overall coverage decreased (-2.0e**-05%**) to 27.453%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
server-base/src/main/java/org/apache/kylin/rest/service/CubeService.java	0	11	0.0%

Files with Coverage Reduction	New Missed Lines	%
core-job/src/main/java/org/apache/kylin/job/impl/threadpool/DefaultScheduler.java	2	80.23%
stream-core/src/main/java/org/apache/kylin/stream/core/storage/CheckPointStore.java	2	73.74%
core-cube/src/main/java/org/apache/kylin/cube/inmemcubing/MemDiskStore.java	4	77.81%

Totals
Change from base Build 5496:	-2.0e-05%
Covered Lines:	24071
Relevant Lines:	87680

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💛 - Coveralls

[hit-lacus]

I have tested it, it works well, let's merge it.