message: Fix flakiness in ConvolutionInPlaneTest.testVertConvWithBlankImage by
  switching from assertAllEqual to assertAllClose.
diff: @@ -1288,7 +1288,7 @@ class ConvolutionInPlaneTest(test.TestCase):
  result = sess.run(vert_gradients)
  expected = np.zeros((1, 9, 10, 1))
  - self.assertAllEqual(result, expected)
  + self.assertAllClose(result, expected, rtol=1e-5, atol=1e-5)
  def testVertConvWithVaryingImage(self):
  image = np.asmatrix(('1.0 2.0 3.0;' '1.1 2.0 4.0;' '-4.3 0.0 8.9'))
  