Use assertEqual() instead of assertEquals(). (GH-9721) (GH-9725)

Fixes warnings in test added in bpo-34603. (cherry picked from commit 4642d5f)

Author: serhiy-storchaka

Lib/ctypes/test/test_win32.py

@@ -68,7 +68,7 @@ class S(Structure):
  for i, f in enumerate(fields):
  value = getattr(res, f[0])
  expected = bytes([ord('a') + i])
- self.assertEquals(value, expected)
+ self.assertEqual(value, expected)