test_rinda.rb: hungup investigation

* test/rinda/test_rinda.rb (test_do_reply): abort on exception to
  investigate sporadic hungups on rubyci.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44632 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* 2014-01-18

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44633 b2dd03c8-39d4-4d8f-98ff-823fe69b080e