test/unit.rb: restore parallel option

	* test/lib/test/unit.rb (_run_parallel): restore parallel option
  after retrying for --repeat-count option.
	------------------------------------------------------------------------
	r57170 | nobu | 2016-12-24 20:56:12 +0900 (Sat, 24 Dec 2016) | 1 line

	time.c: fix typo in value_insane_p
	------------------------------------------------------------------------
	r57171 | nobu | 2016-12-24 21:19:23 +0900 (Sat, 24 Dec 2016) | 1 line

	time.c: remove debug code
	------------------------------------------------------------------------
	r57172 | nobu | 2016-12-24 21:21:52 +0900 (Sat, 24 Dec 2016) | 4 lines

	time.c: fix type of usec2subsecx

	* time.c (usec2subsecx): fix return type, which is a numeric
  object but not a long int.  [ruby-dev:49912] [Bug #13066]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_4@57830 b2dd03c8-39d4-4d8f-98ff-823fe69b080e