merge revision(s) r45891,r45893,r45895:

	test_beginendblock.rb, test_signal.rb: run with default handler

	* test/ruby/test_beginendblock.rb (test_propagate_signaled): run
  with default handler.

	* test/ruby/test_signal.rb (test_hup_me): ditto.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@45905 b2dd03c8-39d4-4d8f-98ff-823fe69b080e