message: Reinstate the convolution tests - accidentally removed
diff: @@ -87,10 +87,11 @@ class IpuXlaConvTest(test_util.TensorFlowTestCase):
  with tf.Session() as sess:
  pa = tf.placeholder(tf.float32, [1,2,2,3], name="a")
  pb = tf.placeholder(tf.float32, [1,1,3,2], name="b")
  + pc = tf.placeholder(tf.float32, [1,2,2,6], name="c")
  c = tf.nn.depthwise_conv2d(pa, pb,
  strides=[1,1,1,1],
  padding="SAME")
  - output = c + np.ones([1, 2, 2, 6])
  + output = c + pc
  fd = {
  pa: [[[[1,2,3],
  @@ -100,6 +101,10 @@ class IpuXlaConvTest(test_util.TensorFlowTestCase):
  pb: [[[[6,5],
  [4,3],
  [2,1]]]],
  + pc: [[[[1,1,1,1,1,1],
  + [1,1,1,1,1,1]],
  + [[1,1,1,1,1,1],
  + [1,1,1,1,1,1]]]]
  }
  result = sess.run(output, fd)
  self.assertAllClose(result, [[[[7, 6, 9, 7, 7, 4],
  