#KYLIN-3913 Remove getAllOutputs api in ExecutableManager to avoid OOM for large metadata

[ZhengshuaiPENG]

see https://issues.apache.org/jira/browse/KYLIN-3913
and pr from @lshmouse #557

[asfgit]

Can one of the admins verify this patch?

[coveralls]

Pull Request Test Coverage Report for Build 4458

• 6 of 194 (3.09%) changed or added relevant lines in 5 files are covered.
• 13 unchanged lines in 3 files lost coverage.
• Overall coverage increased (+0.01%) to 27.882%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
core-job/src/main/java/org/apache/kylin/job/dao/ExecutableDao.java	3	6	50.0%
core-job/src/main/java/org/apache/kylin/job/execution/ExecutableManager.java	3	11	27.27%
engine-mr/src/main/java/org/apache/kylin/engine/mr/common/JobInfoConverter.java	0	13	0.0%
tool/src/main/java/org/apache/kylin/tool/JobInstanceExtractor.java	0	18	0.0%
server-base/src/main/java/org/apache/kylin/rest/service/JobService.java	0	146	0.0%

Files with Coverage Reduction	New Missed Lines	%
tool/src/main/java/org/apache/kylin/tool/JobInstanceExtractor.java	1	0.0%
engine-mr/src/main/java/org/apache/kylin/engine/mr/common/JobInfoConverter.java	4	19.08%
server-base/src/main/java/org/apache/kylin/rest/service/JobService.java	8	0.0%

Totals
Change from base Build 4453:	0.01%
Covered Lines:	22794
Relevant Lines:	81751

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💛 - Coveralls

[ZhengshuaiPENG]

Not a good design, close it for now.