KYLIN-3262 add a copy phase for copying jacoco related jars to dev-support folder

[kyotoYaho]

No description provided.

[asfgit]

Can one of the admins verify this patch?

[coveralls]

Pull Request Test Coverage Report for Build 4238

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 6 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.003%) to 26.913%

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Files with Coverage Reduction	New Missed Lines	%
core-job/src/main/java/org/apache/kylin/job/impl/threadpool/DefaultScheduler.java	2	80.23%
core-cube/src/main/java/org/apache/kylin/cube/inmemcubing/MemDiskStore.java	4	78.12%

Totals
Change from base Build 4236:	0.003%
Covered Lines:	18944
Relevant Lines:	70390

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💛 - Coveralls

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@d23d2bd). Click here to learn what that means.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #519   +/-   ##
=========================================
  Coverage          ?   24.44%           
  Complexity        ?     5023           
=========================================
  Files             ?     1160           
  Lines             ?    70390           
  Branches          ?    10013           
=========================================
  Hits              ?    17204           
  Misses            ?    51450           
  Partials          ?     1736

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[shaofengshi]

LGTM, thank you!