Pickling the itk module fails

[jakirkham]

Description

Pickling of the itk module fails.

Steps to Reproduce

import pickle
import itk                                                           

pickle.dumps(itk)

Expected behavior

Pickling succeeds.

Actual behavior

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-3-8fd95ab0c545> in <module>
----> 1 pickle.dumps(itk)

TypeError: can't pickle LazyITKModule objects

Reproducibility

Every time.

Versions

ITK 5.0.0 with some modules as 5.0.0.post1.

$ conda list itk
...
# Name                    Version                   Build  Channel
itk                       5.0.0                    py37_1    conda-forge
itk-core                  5.0.0.post1              pypi_0    pypi
itk-filtering             5.0.0.post1              pypi_0    pypi
itk-numerics              5.0.0.post1              pypi_0    pypi
itk-registration          5.0.0.post1              pypi_0    pypi
itk-segmentation          5.0.0.post1              pypi_0    pypi

Environment

Ubuntu 16.04.5 LTS (Xenial)
Python 3.7.3

[thewtex]

xref #1051

[thewtex]

Pickling via cloudpickle addressed in #1090 .