merge revision(s) r47111,r47212,r47451,r47452,r47680: [Backport #10245]

	* test/minitest/test_minitest_unit.rb: removed obsoleted condition
	  for Ruby 1.8.

	* test/ruby/test_time_tz.rb: ditto.

	* test/ruby/test_time_tz.rb: Fix test error with tzdata-2014g.
	  [ruby-core:65058] [Bug #10245] Reported by Vit Ondruch.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@47700 b2dd03c8-39d4-4d8f-98ff-823fe69b080e