test_rinda.rb: hungup investigation

* test/rinda/test_rinda.rb (with_timeout, wait_for): extract to
  investigate test_do_reply_local too.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44636 b2dd03c8-39d4-4d8f-98ff-823fe69b080e