message: Use ranges for resnet size test
  Summary: Fixes T11019
  Test Plan: Resnet size test pasess
  Reviewers: #tensorflow, samk, timp, anthonyb
  Maniphest Tasks: T11019
diff: @@ -138,7 +138,7 @@ class Resnet18_No_Batchnorm(xla_test.XLATestCase):
  evts = ipu.utils.extract_all_events(out)
  size = ipu.utils.get_memory_size_from_events(evts)
  - self.assertTrue(size < 42000000)
  + self.assertAllInRange([size], 41000000, 43000000)
  def testTraining(self):
  with self.session() as sess:
  @@ -172,7 +172,7 @@ class Resnet18_No_Batchnorm(xla_test.XLATestCase):
  evts = ipu.utils.extract_all_events(out)
  size = ipu.utils.get_memory_size_from_events(evts)
  - self.assertTrue(size < 75000000)
  + self.assertAllInRange([size], 67000000, 71000000)
  if __name__ == "__main__":
  