KYLIN-4187 build dimension dictionary using spark

[RupengWang]

No description provided.

[asf-ci]

Can one of the admins verify this patch?

[RupengWang]

Please don't merge this for the time being

[coveralls]

Pull Request Test Coverage Report for Build 5069

• 0 of 280 (0.0%) changed or added relevant lines in 6 files are covered.
• 5 unchanged lines in 4 files lost coverage.
• Overall coverage decreased (-0.09%) to 27.821%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core-common/src/main/java/org/apache/kylin/common/KylinConfigBase.java	0	1	0.0%
core-metadata/src/main/java/org/apache/kylin/metadata/model/TblColRef.java	0	1	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/JobBuilderSupport.java	0	1	0.0%
engine-spark/src/main/java/org/apache/kylin/engine/spark/SparkBatchCubingJobBuilder2.java	0	18	0.0%
engine-spark/src/main/java/org/apache/kylin/engine/spark/SparkExecutable.java	0	20	0.0%
engine-spark/src/main/java/org/apache/kylin/engine/spark/SparkBuildDictionary.java	0	239	0.0%

Files with Coverage Reduction	New Missed Lines	%
core-dictionary/src/main/java/org/apache/kylin/dict/lookup/cache/RocksDBLookupTable.java	1	81.08%
engine-spark/src/main/java/org/apache/kylin/engine/spark/SparkBatchCubingJobBuilder2.java	1	0.0%
engine-spark/src/main/java/org/apache/kylin/engine/spark/SparkExecutable.java	1	0.0%
core-job/src/main/java/org/apache/kylin/job/impl/threadpool/DefaultScheduler.java	2	80.23%

Totals
Change from base Build 5053:	-0.09%
Covered Lines:	23702
Relevant Lines:	85195

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💛 - Coveralls