test files in a python flat package

[Jun Aruga]

I noticed that the test files (/usr/lib64/python3.7/test) for python37
are occupying more than 50% in the package size, when I was cleaning
the files in my local machine.
If we actually do not use the test files, I do not want to include the
files in the python37 package.
Just want to separate the files as python37-test sub package.
Because of just reducing the file size.

How do you think? I want to hear your opinions.
Here is the bugzilla ticket.

Separate the test directory as python37-test
https://bugzilla.redhat.com/show_bug.cgi?id=1637959