KYLIN-3902 fix JoinDesc in case of same fact column with multiple loo…

[kyotoYaho]

…kup columns

[asfgit]

Can one of the admins verify this patch?

[asfgit]

Can one of the admins verify this patch?

[coveralls]

Pull Request Test Coverage Report for Build 4282

• 0 of 4 (0.0%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.003%) to 26.89%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
query/src/main/java/org/apache/kylin/query/relnode/OLAPJoinRel.java	0	4	0.0%

Files with Coverage Reduction	New Missed Lines	%
core-cube/src/main/java/org/apache/kylin/cube/inmemcubing/MemDiskStore.java	3	78.42%

Totals
Change from base Build 4281:	0.003%
Covered Lines:	18947
Relevant Lines:	70460

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💛 - Coveralls

[shaofengshi]

+1