zdtm: open notify file descriptors in a binary mode

  Send pre-dump notify to 36
  Traceback (most recent call last):
    File "zdtm.py", line 2161, in <module>
      do_run_test(tinfo[0], tinfo[1], tinfo[2], tinfo[3])
    File "zdtm.py", line 1549, in do_run_test
      cr(cr_api, t, opts)
    File "zdtm.py", line 1264, in cr
      test.pre_dump_notify()
    File "zdtm.py", line 490, in pre_dump_notify
      fdin.write(struct.pack("i", 0))
  TypeError: write() argument 1 must be unicode, not str
Signed-off-by: Andrei Vagin <avagin@virtuozzo.com>

test/zdtm.py

@@ -467,7 +467,7 @@ class zdtm_test:
 				print_sep(self.__name + '.out.inprogress')
 				print(open(self.__name + '.out.inprogress').read())
 				print_sep(self.__name + '.out.inprogress')
-			raise test_fail_exc("result check: %s" % list(map(lambda s: s.strip(), res.split())) + res)
+			raise test_fail_exc("result check")
 
 	def getpid(self):
 		if self.__pid == 0: