message: Increase float32 tolerances of SquareLinearOperatorCompositionTest.
  TF random number generators (random_normal, random_uniform, etc) use TF graph's last op ID as a seed. The inputs to SquareLinearOperatorCompositionTest will change when MatrixDiagV2, MatrixDiagPartV2, and MatrixSetDiagV2 replace V1s, and will make the errors go over the threshold from current `atol` and `rtol`.
diff: @@ -37,10 +37,10 @@ class SquareLinearOperatorCompositionTest(
  """Most tests done in the base class LinearOperatorDerivedClassTest."""
  def setUp(self):
  - # Increase from 1e-6 to 1e-4
  - self._atol[dtypes.float32] = 1e-4
  + # Increase from 1e-6 to 1e-4 and 2e-4.
  + self._atol[dtypes.float32] = 2e-4
  self._atol[dtypes.complex64] = 1e-4
  - self._rtol[dtypes.float32] = 1e-4
  + self._rtol[dtypes.float32] = 2e-4
  self._rtol[dtypes.complex64] = 1e-4
  @staticmethod
  