[issue21097] Move test_namespace_pkgs into test_importlib.

[Eric Snow]

New submission from Eric Snow:

While working on #19711 it dawned on me that test_namespace_pkgs might be more appropriate as a submodule of test_importlib.  The feature doesn't have it's own module nor is it otherwise independent of importlib.

I don't want to introduce churn here for the sake of conceptual purity.  Rather, the module would be more discoverable if associated with importlib in this way.  For #19711 I wrote a test case that was overly complicated and did not work (goes hand-in-hand, no?) that I would not have spent time on if I'd remembered about test_namespace_pkgs or seen it somewhere under test_import*.

As a bonus, this change moves 1 file and 1 directory out of Lib/test (a directory that takes "flat is better than nested" to the extreme).

Any objections?

----------
messages: 215145
nosy: barry, brett.cannon, eric.smith, eric.snow, ncoghlan
priority: low
severity: normal
stage: needs patch
status: open
title: Move test_namespace_pkgs into test_importlib.
type: enhancement
versions: Python 3.4, Python 3.5

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue21097>
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