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merge revision(s) 51916: [Backport #11543]

    * test/drb/test_drb.rb: Run Rinda/DRb tests on localhost. [Fix GH-1027]
      patch by voxik.

    * test/rinda/test_rinda.rb: ditto

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@52353 b2dd03c8-39d4-4d8f-98ff-823fe69b080e